ICIS-NPDES Download Summary and Data Element Dictionary

The Enforcement and Compliance History Online (ECHO) system incorporates data from the Integrated Compliance Information System National Pollutant Discharge Elimination System (ICIS-NPDES).


ICIS-NPDES Description

ICIS-NPDES is an information management system maintained by the Office of Compliance to track permit compliance and enforcement status of facilities regulated by the National Pollutant Discharge Elimination System (NPDES) under the Clean Water Act (CWA). ICIS-NPDES is designed to support the NPDES program at the state, regional, and national levels.

Active facilities are those currently in operation. Major/federally-reportable are facilities for which states must submit compliance and enforcement data to EPA. Under the Clean Water Act, a major facility is any NPDES facility or activity classified as such by the regional administrator, or in the case of approved state programs, the regional administrator in conjunction with the state director. Major municipal dischargers include all facilities with design flows of greater than one million gallons per day and facilities with EPA/state approved industrial pretreatment programs. Major industrial facilities are determined based on specific ratings criteria developed by EPA/state.

Minor/not federally-reportable are facilities for which states are not required to submit data to EPA. EPA is therefore not able to verify the accuracy or comparability of data for these permits, although the Agency tracks their names and locations and may have some data about their inspections and enforcement activity.

ICIS-NPDES records included in the download files are those with any permit status code value for the current permit record. ICIS-NPDES includes the following data types:

  • Permit facility data
  • Inspection information
  • Permit schedule violations
  • Effluent violations
  • Compliance schedule violations
  • Single Event violations
  • Enforcement actions

The violation data includes system-generated records. ICIS automatically generates three basic types of violations: schedule violations, effluent violations, and DMR non-receipt violations. For each of these three types of violations, there are one or two automatic processes that serve to generate the violations. For each type, there is a process that runs when certain data related to requirements or permittee performance are entered or edited. For schedule violations and DMR non-receipt violations, there are also processes that run nightly. In addition to these automatically generated violations, users can manually enter single event violations. The table below lists the specific types of violations that may be generated by ICIS or manually entered.

Code Violation Type Description Generated by
D80 DMR Non-Receipt Required monitoring DMR value overdue System
D90 DMR Non-Receipt Limited value overdue System
E90 Effluent Reported DMR value exceeds maximum or average limit value or is below minimum limit value System
C10 Schedule Schedule event reported late System
C20 Schedule Schedule event achieved late but reported System
C30 Schedule Schedule event not achieved but reported System
C40 Schedule Schedule not achieved and not reported System
Various Single Event Any manually determined violation User

Limited enforcement action data are provided from ICIS FE&C where a NPDES program interest linkage exists. More detailed information about linked enforcement actions can be obtained from the ICIS FE&C download files, by using the Enforcement Action Identifier (ENF_IDENTIFIER).

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Guidance on ICIS-NPDES Downloads

Only certain data elements from ICIS-NPDES are incorporated into ECHO and a subset of these are provided in the download format. This document contains a list of these data elements, as well as available definitions. The data element table in Section 1.2 presents the ICIS-NPDES data elements in related groups that parallel the data's relationships.

There are two sets of download data. One ZIP file contains a single comma-separated value file for Effluent Violations (NPDES_EFF_VIOLATIONS.csv); the other ZIP file contains 10 comma-separated value files. Data were selected based on a single criterion: that the ICIS-NPDES Permit Status (PERMIT_STATUS) for the current permit version is equal to any non-null value. The files may contain repeating data fields, which will cause records to repeat the key field(s), e.g., NPDES_ID, where a permit has multiple values of the repeating field(s).

Key field columns are present in all CSV files and may be used to join and relate data between files. The following table describes how the tables may be joined:

Key fields Tables
1 NPDES_ID or EXTERNAL_PERMIT_NMBR All Tables
2 REGISTRY_ID or FACILITY_UIN ICIS_FACILITIES, NPDES_INSPECTIONS, NPDES_INFORMAL_ENFORCEMENT_ACTIONS
3 NPDES_VIOLATION_ID {NPDES_PS_VIOLATIONS, NPDES_CS_VIOLATIONS, NPDES_SE_VIOLATIONS, NPDES_EFF_VIOLATIONS}*, NPDES_VIOLATION_ENFORCEMENTS

* NPDES_VIOLATION_ID is a unique identifier for violations in ICIS-NPDES. The ICIS-NPDES data downloads provide violations in four tables by type, and as such, the violations in these tables represent unique records and cannot be joined. However, NPDES_VIOLATION_ID may be used to join to the NPDES_VIOLATION_ENFORCEMENTS table, which describes the EPA civil enforcement action, if any, resulting from a violation.

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ICIS-NPDES Data Elements by Table

Facility (ICIS_FACILITIES.csv)

Element Name Data Type Length
ICIS_FACILITY_INTEREST_ID Num 22
NPDES_ID1 Char 30
FACILITY_UIN2 Char 12
FACILITY_TYPE_CODE Char 3
FACILITY_NAME Char 80
LOCATION_ADDRESS Char 50
SUPPLEMENTAL_ADDRESS_TEXT Char 50
CITY Char 60
COUNTY_CODE Char 5
STATE_CODE Char 2
ZIP Char 14
GEOCODE_LATITUDE Char 10
GEOCODE_LONGITUDE Char 11
IMPAIRED_WATERS Char 20

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Permit (ICIS_PERMITS.csv)

Element Name Data Type Length
ACTIVITY_ID Num 22
EXTERNAL_PERMIT_NMBR1 Char 9
VERSION_NMBR Num 22
FACILITY_TYPE_INDICATOR Char 10
PERMIT_TYPE_CODE Char 3
MAJOR_MINOR_STATUS_FLAG Char 1
PERMIT_STATUS_CODE Char 3
TOTAL_DESIGN_FLOW_NMBR Num 22
ACTUAL_AVERAGE_FLOW_NMBR Num 22
STATE_WATER_BODY Char 12
STATE_WATER_BODY_NAME Char 50
WBD_HUC12 Char 12
PERMIT_NAME Char 120
AGENCY_TYPE_CODE Char 3
ORIGINAL_ISSUE_DATE Date 7
ISSUE_DATE Date 7
ISSUING_AGENCY Char 100
EFFECTIVE_DATE Date 7
EXPIRATION_DATE Date 7
RETIREMENT_DATE Date 7
TERMINATION_DATE Date 7
PERMIT_COMP_STATUS_FLAG Char 1
DMR_NON_RECEIPT_FLAG Char 1
RNC_TRACKING_FLAG Char 1
MASTER_EXTERNAL_PERMIT_NMBR Char 9
TMDL_INTERFACE_FLAG Char 1

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Permit Components (NPDES_PERM_COMPONENTS.csv)

Element Name Data Type Length
EXTERNAL_PERMIT_NMBR1 Char 9
COMPONENT_TYPE_CODE Char 3
COMPONENT_TYPE_DESC Char 100

Permit Feature Coordinates (NPDES_PERM_FEATURE_COORDS.csv)

Element Name Data Type Length
EXTERNAL_PERMIT_NMBR1 Char 9
PERM_FEATURE_NMBR Char 3
PERM_FEATURE_ID Number  
LATITUDE_MEASURE Num 22
LONGITUDE_MEASURE Num 22

NAICS Code (NPDES_NAICS.csv)

Element Name Data Type Length
NPDES_ID1 Char 30
NAICS_CODE Char 6
NAICS_DESC Char 100
PRIMARY_INDICATOR_FLAG Char 1

SIC Code (NPDES_SICS.csv)

Element Name Data Type Length
NPDES_ID1 Char 30
SIC_CODE Char 4
SIC_DESC Char 100
PRIMARY_INDICATOR_FLAG Char 1

Inspections (NPDES_INSPECTIONS.csv)

Element Name Data Type Length
REGISTRY_ID2 Char 36
NPDES_ID1 Char 30
ACTIVITY_ID Num 22
ACTIVITY_TYPE_CODE Char 3
COMP_MONITOR_TYPE_CODE Char 3
COMP_MONITOR_TYPE_DESC Char 100
STATE_EPA_FLAG Char 1
ACTUAL_END_DATE Date 7
ACTIVITY_OUTCOME_CODE Num 22
ACTIVITY_OUTCOME_DESC Char 100

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QNCR Historic Compliance (NPDES_QNCR_HISTORY.csv)

Element Name Data Type Length
NPDES_ID1 Char 9
YEARQTR Char 5
HLRNC Char 1
NUME90Q Num 22
NUMCVDT Num 22
NUMSVCD Num 22
NUMPSCH Num 22

Permit Schedule Violations (NPDES_PS_VIOLATIONS.csv)

Element Name Data Type Length
NPDES_ID1 Char 30
NPDES_VIOLATION_ID3 Num 22
PERM_SCHEDULE_EVENT_ID Num 22
VIOLATION_TYPE_CODE Char 6
VIOLATION_TYPE_DESC Char 100
VIOLATION_CODE Char 5
VIOLATION_DESC Char 100
SCHEDULE_EVENT_CODE Char 5
SCHEDULE_EVENT_DESC Char 100
SCHEDULE_DATE Date 7
RNC_DETECTION_CODE Char 3
RNC_DETECTION_DESC Char 100
RNC_DETECTION_DATE Date 7
RNC_RESOLUTION_CODE Char 3
RNC_RESOLUTION_DESC Char 100
RNC_RESOLUTION_DATE Date 7

Compliance Schedule Violations (NPDES_CS_VIOLATIONS.csv)

Element Name Data Type Length
NPDES_ID1 Char 30
NPDES_VIOLATION_ID3 Num 22
VIOLATION_TYPE_CODE Char 6
VIOLATION_TYPE_DESC Char 100
COMP_SCHEDULE_EVENT_ID Num 22
COMP_SCHEDULE_NMBR Num 22
VIOLATION_CODE Char 5
VIOLATION_DESC Char 100
SCHEDULE_EVENT_CODE Char 5
SCHEDUE_EVENT_DESC Char 100
SCHEDULE_DATE Date 7
ACTUAL_DATE Date 7
RNC_DETECTION_CODE Char 3
RNC_DETECTION_DESC Char 100
RNC_DETECTION_DATE Date 7
RNC_RESOLUTION_CODE Char 3
RNC_RESOLUTION_DESC Char 100
RNC_RESOLUTION_DATE Date 7

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Single Event Violations (NPDES_SE_VIOLATIONS.csv)

Element Name Data Type Length
NPDES_ID1 Char 9
NPDES_VIOLATION_ID3 Num 22
VIOLATION_TYPE_CODE Char 6
VIOLATION_CODE Char 5
VIOLATION_DESC Char 100
SINGLE_EVENT_VIOLATION_DATE Date 7
SINGLE_EVENT_BEGIN_DATE Date 7
SINGLE_EVENT_END_DATE Date 7
SINGLE_EVENT_VIOLATION_COMMENT Char 4000
SINGLE_EVENT_AGENCY_TYPE_CODE Char 3
RNC_DETECTION_CODE Char 3
RNC_DETECTION_DESC Char 100
RNC_DETECTION_DATE Date 7
RNC_RESOLUTION_CODE Char 3
RNC_RESOLUTION_DESC Char 100
RNC_RESOLUTION_DATE Date 7

CWA Enforcement Actions (NPDES_FORMAL_ENFORCEMENT_ACTIONS.csv)

Element Name Data Type Length
NPDES_ID1 Char 30
ENF_IDENTIFIER Char 20
ACTIVITY_ID Num 22
ACTIVITY_TYPE_CODE Char 3
ACTIVITY_TYPE_DESC Char 100
ENF_TYPE_CODE Char 7
ENF_TYPE_DESC Char 100
AGENCY Char 5
SETTLEMENT_ENTERED_DATE Date 7
FED_PENALTY_ASSESSED_AMT Num 22
STATE_LOCAL_PENALTY_AMT Num 22

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CWA Informal Enforcement Actions (NPDES_INFORMAL_ENFORCEMENT_ACTIONS.csv)

Element Name Data Type Length
NPDES_ID1 Char 30
REGISTRY_ID2 Char 36
AGENCY Char 5
ACTIVITY_ID Num 22
ACTIVITY_TYPE_CODE Char 3
ACTIVITY_TYPE_DESC Char 100
ENF_TYPE_CODE Char 7
ENF_TYPE_DESC Char 100
ACHIEVED_DATE Date 7
ENF_IDENTIFIER Char 20

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Effluent Violations (NPDES_EFF_VIOLATIONS.csv)

Element Name Data Type Length
NPDES_ID1 Char 9
VERSION_NMBR Num 22
ACTIVITY_ID Num 22
NPDES_VIOLATION_ID3 Num 22
PERM_FEATURE_NMBR Char 4
PERMIT_ACTIVITY_ID Num 22
LIMIT_SET_DESIGNATOR Char 2
MONITORING_LOCATION_CODE Char 3
DMR_FORM_VALUE_ID Num 22
DMR_VALUE_NMBR Num 22
DMR_VALUE_ID Num 22
DMR_PARAMETER_ID Num 22
NODI_CODE Char 3
ADJUSTED_DMR_VALUE_NMBR Num 22
VIOLATION_TYPE_CODE Char 6
VIOLATION_TYPE_DESC Char 100
VIOLATION_CODE Char 5
VIOLATION_DESC Char 100
PARAMETER_CODE Char 5
PARAMETER_DESC Char 100
MONITORING_PERIOD_END_DATE Date 7
NMBR_OF_REPORT Num 2
EXCEEDANCE_PCT Num 22
VALUE_QUALIFIER_CODE Char 3
UNIT_CODE Char 2
VALUE_RECEIVED_DATE Date 7
DAYS_LATE Num 22
ADJUSTED_DMR_STANDARD_UNITS Num 22
LIMIT_ID Num 22
DMR_VALUE_STANDARD_UNITS Num 22
VALUE_TYPE_CODE Char 3
RNC_DETECTION_CODE Char 3
RNC_DETECTION_DESC Char 100
RNC_DETECTION_DATE Date 7
RNC_RESOLUTION_CODE Char 3
RNC_RESOLUTION_DESC Char 100
RNC_RESOLUTION_DATE Date 7
STATISTICAL_BASE_CODE Char 3
STATISTICAL_BASE_MONTHLY_AVG Char 1

Violation Enforcement Actions (NPDES_VIOLATION_ENFORCEMENTS.csv)

This table links civil CWA enforcement actions to specific violations.

Element Name Data Type Length
NPDES_VIOLATION_ID3 Num 22
VIOLATION_CODE Char 5
VIOLATION_DESC Char 100
ACTIVITY_ID Num 22
ACTIVITY_TYPE_DESC Char 100
ENF_IDENTIFIER Char 20

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ICIS-NPDES Data Element Definitions

The following is a list of the data elements and ICIS-derived elements that appear in the ECHO ICIS-NPDES download.

ACHIEVED_DATE - The date on which an Informal Enforcement Action is achieved. For an informal action based on only oral notification, it is the date the regulated entity actually received such notification.

ACTIVITY_ID - The unique identifier for an activity performed at or related to a particular site.

ACTIVITY_TYPE_CODE - A code describing the type of civil enforcement activity. Valid values are:

Code Description
AIF Administrative, Informal
AFR Administrative, Formal
JDC Judicial

ACTIVITY_TYPE_DESC - Full text description for ACTIVTY_TYPE_CODE.

ACTIVITY_OUTCOME_CODE - Contains a code describing the outcome of the inspection.

ACTIVITY_OUTCOME_DESC - Full text description for ACTIVITY_OUTCOME_CODE.

ACTUAL_END_DATE - Identifies the calendar date of the listed inspection (MM/DD/YYYY).

ADJUSTED_DMR_STANDARD_UNITS - The Adjusted DMR value expressed in standard units as calculated by the system.

ADJUSTED_DMR_VALUE_NMBR - The Adjusted DMR value number reported on the DMR if an effluent trade(s) has taken place for a Limit parameter that has at least one effluent trade partner.

AGENCY - Identifies the agency lead (S = State, E = EPA) for the listed enforcement action.

AGENCY_TYPE_CODE - A three character code indicating the type of organization issuing or granting a permit. Valid code values are:

Code Description
ST6 State
MN6 Municipal
CT6 County
RG6 Regional
EP6 U.S. EPA
EC6 EPA Contractor
EO6 Other - EPA
IN6 Interstate
LC6 Local
OF6 Other Federal
SC6 State Contractor
SO6 Other - State
TR6 Tribal
UN6 Unknown from Conversion
SE6 SEE Inspector
OT6 Other
CR6 Contractor

ACTUAL_AVERAGE_FLOW_NMBR - The flow that a permitted feature actually had at the time of application., expressed as millions of gallons per day (MGD).

CITY - A 60 character field that contains the name of the city in which the facility is located.

COMP_MONITOR_TYPE_CODE - Contains a code describing the type of inspection that was conducted.

COMP_MONITOR_TYPE_DESC - Full text description of COMP_MONITOR_TYPE_CODE.

COMP_SCHEDULE_EVENT_ID - (Compliance Schedule Event ID) The unique identifier of the Compliance Schedule Event to which the Violation is associated; it is only used for Schedule Violations of a Final Order.

COMP_SCHEDULE_NMBR - A 2-digit number which in combination with the Schedule Type and NPDES ID uniquely identifies a Compliance Schedule.

COMPONENT_TYPE_CODE - A 3-character code describing the permit component(s) associated with the NPDES Permit Program Area.

COMPONENT_TYPE_DESC - Description of the permit component(s) associated with the NPDES Permit Program Area.

COUNTY_CODE - A five digit field that contains the FIPS county code in which the facility is located, used in conjunction with the facility state code. A list of codes and descriptions can be found at 2010 FIPS Codes for Counties.

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DAYS_LATE - The system-generated number of days the Discharge Monitoring Report value was late (as compared to the DMR_DUE_DATE) in ICIS.

DMR_FORM_VALUE_ID - The sequence ID identifying the DMR Form Value.

DMR_NON_RECEIPT_FLAG - The flag indicating whether or not the permit is subject to the DMR run. Value is (Y)es or No (null value). DMR_PARAMETER_ID - The system-generated unique identifier for the DMR parameter to which the DMR value belongs.

DMR_VALUE_ID - The system-generated unique identifier for the DMR value.

DMR_VALUE_NMBR - The DMR value number reported on the DMR form.

DMR_VALUE_STANDARD_UNITS - The DMR value expressed in standard units as calculated by the system.

EDMR_AUTHORIZATION_FLAG - This indicates whether DMRs for the Permit may be submitted electronically.

EFFECTIVE_DATE - The date the permit became effective or is scheduled to become effective (MM/DD/YYYY).

ENF_IDENTIFIER - The unique identifying number of the Enforcement Action as referred to by the Court where the action was filed; the Enforcement Action Identifier. This element is commonly referred to as the case number.

ENF_TYPE_CODE - A code describing which enforcement action was taken in response to a violation.

ENF_TYPE_DESC - A text description of the ENF_TYPE_CODE value.

EXCEEDENCE_PCT - The system-generated percent by which the DMR value (or Adjusted Value) exceeded its Limit (or stay) value.

EXPIRATION_DATE - The date the permit expired or is scheduled to expire (MM/DD/YYYY).

EXTERNAL_PERMIT_NMBR - See NPDES_ID

FACILITY_NAME - An 80-character field that contains the name of the facility.

FACILITY_UIN - The number assigned by the Facility Registry Service (FRS) that is used to associate facility records from multiple environmental database systems that are known or believed to represent the same facility.

FACILITY_TYPE_CODE - A 3-character code indicating ownership type of the facility.

Code Description
CNG County Government
COR Corporation
CTG Municipality
DIS District
FDF Federal Facility (U.S. Government)
GOC GOCO (Gov Owned/Contractor Operated)
IND Individual
MWD Municipal or Water District
MXO Mixed Ownership (e.g., Public/Private)
NON Non-Government
POF Privately Owned Facility
SDT School District
STF State Government
TRB Tribal Government
UNK Unknown

FACILITY_TYPE_INDICATOR - A 10-character code indicating the facility as either a POTW, non-POTW, or federal entity.

FED_PENALTY_ASSESSED_AMT - The dollar amount of federal civil penalties assessed or agreed to at a formal enforcement action. Where the enforcement case results in multiple settlements, this represents the sum of penalty amounts for all of the settlements.

GEOCODE_LATITUDE - The latitude of the facility or permit holder as maintained in each data system. The FRS lat/long is from the EPA Locational Reference Tables (LRT) file which represents the "best" value for the latitude and longitude coordinates.

GEOCODE_LONGITUDE - The longitude of the facility or permit holder as maintained in each data system. The FRS lat/long is from the EPA Locational Reference Tables (LRT) file.

HLRNC - (Historic Noncompliance) An historic tracking of the latest reported QNCR value (LRNC) at the end of a quarter. HLRNC is a reconciliation of the current quarter automatic and manual QNCR values. The Historic Noncompliance field is derived by HLRNC and corresponds to the quarter indicated by HQRTR. Valid code values are:

Code Short Description Long Description
C COMPLIANT Not considered in RNC/SNC based on manual review of data by state or EPA region.
D NC-SNC DMR NON-RECPT SNC/Category I - reporting violation - non-receipt of DMR
E NC-SNC EFFLUENT VIOL SNC/Category I - effluent violations of monthly average limits (Technical Review Criteria and chronic)
N NC-RNC VIOLTNS ONLY RNC/Category II - reportable noncompliance
P RESOLVED PENDING Resolved Pending - an enforcement action has been issued, and facility compliance with the action is pending final completion
Q RESOLVED PENDING - CS Resolved Pending - Compliance Schedule (manual only)
R RESOLVED Resolved - the facility has returned to compliance with its permit conditions, either with or without issuance of an enforcement action
S NC-SNC COMP SCHD VIOL SNC/Category I - an enforcement action has been issued, and the facility is not meeting its compliance schedule
T NC-SNC COMP SCHD RPT SNC/Category I - compliance schedule reporting violation
U UNDETERMINED Undetermined QNCR Status - insufficient data, or permitee is a minor discharger not subject to mandatory reporting
V NC-NON-RNC VIOLATIONS Non-RNC Violations
W UNKNOWN Unknown QNCR Status – minor dischargers with a QNCR status of DMR non-receipt status are changed to W, except for states that have agreed to QA the QNCR data for minors. DMR data is not required data entry for minor dischargers.
X NC-SNC-EF NONMNTH AV SNC/Category I - effluent violations of non-monthly average limits (Technical Review Criteria and chronic)

ICIS_FACILITY_INTEREST_ID - The system-generated unique ID for identifying the facility interest.

IMPAIRED_WATERS The impairment class or category of the waterbody in which the facility is permitted to discharge directly. The data are from the ATTAINS database. Detailed information on the categorization of waters can be found in Section V of the 2006 Integrated Report Guidance.

  • 5. Impaired - TMDL needed. Available information indicates that at least one designated use is not being supported and a TMDL is needed (also known as the 303(d) listed waters).
  • 4. Impaired - TMDL not needed. Available information indicates that at least one designated use is not being supported, but a TMDL is not needed (see subcategories).
  • 4a. TMDL completed. A TMDL has been completed, but impairment still exists.
  • 4b. TMDL alternative. Impairment is being addressed by a method other than a TMDL (e.g., stream bank improvements).
  • 4c. Non-pollutant causes. Cause of impairment is not a pollutant (e.g., habitat destruction). 

ISSUE_DATE - The date the permit was issued (MM/DD/YYYY).

ISSUING_AGENCY - This is the name of the organization issuing or granting a permit.

LATITUDE_MEASURE - The horizontal position coordinate for the point of discharge location in units of decimal degrees. Latitude and longitude coordinates are not required to be entered into ICIS-NPDES. Searching on coordinates will only return results for permit features that have latitude and longitude data in ICIS-NPDES.

LONGITUDE_MEASURE - The vertical position coordinate for the point of discharge location in units of decimal degrees. ICIS-NPDES does not require Latitude and longitude coordinates to be entered. Searching on coordinates will only return results for permit features that have latitude and longitude data in ICIS-NPDES.

LIMIT_ID - The unique identifier for a limit parameter record.

LIMIT_SET_DESIGNATOR - The alphanumeric field that is used to designate a particular grouping of parameters within a limit set.

LOCATION_ADDRESS - The street address of the facility.

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MAJOR_MINOR_STATUS_FLAG - A 1-character code that designates the facility as a major discharger (M), minor discharger (N), or that no data is available (null value), such as for unpermitted facilities.

MONITORING_LOCATION_CODE - The code descriping the location at which the monitoring requirement (and numeric effluent limit, if limited) applies. One parameter may have several monitoring location requirements pertaining to the same permitted feature. Valid code values are:

Code Description
0 Intake
1 Effluent Gross
2 Effluent Net
3 Intake Public Water
4 Pretreatment, Process Complete
5 Upstream Monitoring
6 Downstream Monitoring
7 Intake from Stream
8 Other Treatment, Process Complete
9 Phosphate Removal, Process Complete
A Disinfection, Process Complete
AP Alternate Process
B Prior to Disinfection
C Nitrogen, Removal Complete
D Tertiary/Advanced Process Complete
E Secondary/Biological Process Complete
EG Effluent Gross
F Primary/Preliminary Process Complete
G Raw Sewage Influent
H During Manufacturing
I Intake from Well
IN Allowed Increase
J Intermediate Treatment, Process Complete
K Percent Removal
L Digestor
N In Aeration Unit
O See Comments
P See Comments
Q See Comments
R See Comments
RS Beneficial Reuse
RW Receiving Water
S See Comments
SC See Comments
SL Sludge
T See Comments
U See Comments
V See Comments
W See Comments
X End of Chlorine Contact Chamber
Z Instream Monitoring
Y Effluent Gross (Supplementary)
GW Groundwater
II Industrial Influent
IM Internal Monitoring Point
PI Prior to Irrigation
PR Prior to Reuse
LA Land Application Soil

MASTER_EXTERNAL_PERMIT_NMBR - This is the unique identifier for the Master General Permit for a General Permit Covered Facility.

MONITORING_PERIOD_END_DATE - The date that the monitoring period for the values covered by this DMR Form ends (YYYYMMDD).

NAICS_CODE - The 6-digit North American Industry Classification System (NAICS) code that represents a subdivision of an industry that accommodates user needs in the United States. For detailed information about NAICS and for a crosswalk between NAICS and SIC codes, please check the U.S. Census Bureau websiteExit.

NAICS_DESC - The corresponding description of North American Industry Classification System (NAICS) code.

NMBR_OF_REPORT -  The number of months covered by the DMR for which the effluent violation was generated (e.g., monthly = 1, quarterly = 3, semi-annually = 6).

NPDES_ID - This field contains a NPDES number formatted to define the general permit, the industrial classification, and the sequence number. This NPDES number may reflect either the permit or a facility covered by the permit. This element is also identified as EXTERNAL_PERMIT_NMBR in some download files.

NPDES_VIOLATION_ID - The unique identifier for the violation related to a particular site.

NUMCVDT - (Number of Compliance Schedule Violations in Quarter) A count of the number of compliance schedule violations reported in the quarter, defined by YEARQTR.

NUME90Q - (Number of E90 Violations in Quarter) A count of the number of effluent violations (E90) reported in the quarter, defined by YEARQTR.

NUMPSCH - (Number of Permit Schedule Violations in Quarter) A count of the number of permit schedule violations reported in the quarter, defined by YEARQTR.

NUMSVCD - (Number of Single Event Violations in Quarter) A count of the number of single event violations reported in the quarter, defined by PRHQRTR.

PARAMETER_CODE - The unique code identifying the parameter being reported on the DMR.

PARAMETER_DESC - Text description of the PARAMETER_CODE.

PERM_FEATURE_ID - The unique system identifier for a permitted feature.

PERM_FEATURE_NMBR - The 3-digit code representing the permitted outfall or pipe of interest in ICIS-NPDES (e.g., 001). This is the identifier assigned for each location at which permit conditions are being applied.

PERM_SCHEDULE_EVENT_ID - The unique identifier of the Permit Schedule Event to which the Violation is associated; it is only used for Schedule Violations of a Permit.

PERMIT_COMP_STATUS_FLAG - This is a code that indicates whether the permit is currently on or off for compliance tracking purposes. Value is (Y)es or No (null value).

PERMIT_NAME - This is the name of the facility having the National Pollutant Discharge Elimination System (NPDES) permit to discharge pollutants in the waters of the United States.

PERMIT_STATUS_CODE - ICIS-NPDES designates a permit as Effective (EFF), Administratively Continued (ADC), Expired (EXP), Not Needed (NON), Pending (PND), Retired (RET), or Terminated (TRM).

PERMIT_TYPE_CODE - The unique code identifying the type of permit. Valid code values and descriptions are below.

PERMIT_TYPE_DESC - Text description for PERMIT_TYPE_CODE. Valid code values and descriptions are below.

Code Description
NPD NPDES Individual Permit
NGP NPDES Master General Permit
GPC General Permit Covered Facility
SNN State Issued Master General Permit (Non-NPDES)
IIU Individual IU Permit (Non-NPDES)
SIN Individual State Issued Permit (Non-NPDES)
APR Associated Permit Record
UFT Unpermitted Facility

PRETREATMENT_INDICATOR_CODE - A 1-character code which indicates if the permitted municipality is required to develop a pretreatment program. Valid code values are:

Code Description
C Covered
E EPA
R Required and Developing
S State
Y Approved

PRIMARY_INDICATOR_FLAG - The flag indicating whether the NAICS or SIC code is the primary code for the Facility. Value is (Y)es or No (null value).

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REGISTRY_ID - See FACILITY_UIN

RETIREMENT_DATE - The date the permit was retired (YYYYMMDD).

RNC_DETECTION_DATE - The date associated with RNC_DETECTION_CODE (MM/DD/YYYY).

RNC_DETECTION_CODE - Indicates reportable noncompliance (RNC) for a particular violation event. Valid code values are:

Code Description
A Enforcement Order
B Manual 2A4 - Pass-Through
C Chronic Violation
D Manual Other
E Manual 2F - Permit Narrative
F Manual 2G - Violation of Concern
G Manual 2A1 - Effluent Violation
H Chronic Violation, Non-Monthly Average
I Manual 2A2 - Unauthorized Bypass
J Manual 2A3 - Unpermitted Discharge
K Non-receipt Violation, Non-Monthly Average
N Non-Receipt of DMR/Schedule Report
P Enforcement Order, Non-Monthly Average
Q Manual 2B - Pretreatment
R TRC Limitations Exceeded, Non-Monthly Average
S Schedule Violation
T TRC Limitations Exceeded
U Other Violation with TRC Non-Monthly Average
V Other Violation with TRC
W Manual 2E - Deficient Report
X Manual Other Violation with TRC
Y Manual TRC
Z Manual Chronic

RNC_DETECTION_DESC - Text description of the code value RNC_DETECTION_CODE.

RNC_RESOLUTION_DATE - The date associated with VIORNRC (MM/DD/YYYY).

RNC_RESOLUTION_CODE - A code indicating how RNC was resolved for a particular violation. Valid code values are:

Code Description
A NC - Manual Unresolved RNC
B RE - Manual by EPA/State/Tribal Action
1 NC - Unresolved RNC
2 RE - Back into Compliance
3 RP - Due to Formal Enforcement Action Final Order with Compliance Schedule
4 RP - In Compliance with Formal Enforcement Action Final Order Requirement
5 RE - Resolved RP by NPDES Closure of Enforcement Action Final Order with Compliance Schedule
6 RE - Manual Resolution by Enforcement Action
7 RP - Manual RP - In Compliance with Formal Enforcement Action Order Requirement
8 RP - Manual Due to Formal Enforcement Action Formal Order
9 RE - Manual by Back into Compliance

RNC_RESOLUTION_DESC - Text description of the code value RNC_RESOLUTION_CODE.

RNC_TRACKING_FLAG - The flag indicating if the RNC tracking is on. Value is (Y)es or No (null value).

SCHEDULE_DATE - The date the compliance schedule or permit schedule event is scheduled to be completed (i.e., the due date).

SCHEDULE_EVENT_CODE - The code indicating the particular event with which the permittee is scheduled to comply.

SCHEDULE_EVENT_DESC - Text description of the code value for SCHEDULE_EVENT_CODE.

SETTLEMENT_ENTERED_DATE - The date of the enforcement action (MM/DD/YYYY). Where multiple settlements are associated with a single enforcement action, this represents the earliest date entered.

SIC_CODE - The 4-digit Standard Industrial Classification (SIC) code that represents the economic activity of a company. Note the NAICS classification system replaced the SIC classification system in 1997. These SIC codes are no longer collected by some EPA programs. A list of codes may be found at the OSHA SIC System SearchExit.

SIC_DESC - The corresponding description of the Standard Industrial Classification (SIC) code.

SINGLE_EVENT_VIOLATION_DATE - The date of a single event violation (MM/DD/YYYY).

STATE_CODE - A two-character field that contains the state postal abbreviation for the state in which the facility is located.

STATE_EPA_FLAG - Identifies the agency lead (S = State, E = EPA) for the listed inspection.

STATE_LOCAL_PENALTY_AMT - The dollar amount of state or local civil penalties assessed or agreed to at a formal enforcement action. Where the enforcement case results in multiple settlements, this represents the sum of penalty amounts for all of the settlements.

STATE_WATER_BODY - The state’s code to identify the water body into which the effluent is discharged for a Permitted Feature.

STATE_WATER_BODY_NAME - The state’s name for the water body into which the effluent is discharged for a Permitted Feature.

STATISTICAL_BASE_CODE - The code that defines the statistical analysis to be used for the limit value. Valid code values are:

Type Code Long Description
AVG 1A 1 Day Geometric
AVG 1C 12 Day Average
AVG 1D 12 Month Average
AVG 1E 12 Month Daily Water Flow
AVG 1F 120 Day Average
AVG 1G 180 Day Arithmetic Mean
AVG 1H 1 Day Average
AVG 1I 1 Hour Average
AVG 3A 30 Day Geometric Mean
AVG 3B 30 Day Arithmetic
AVG 3C 30 Day Average
AVG 3D 30 Day Geometric
AVG 3F 30 Day Arithmetic Mean
AVG 3G 30 Day Median
AVG 3H 30 Day Average Geometric
AVG 3I 3 Hour Average
AVG 4A 4 Day Average
AVG 4D 4 Hour Average
AVG 5B 5 Day Average
AVG 5Y 5 Year Average
AVG 6A 6 Month Median
AVG 6B 6 Hour Mean
AVG 6C 6 Hour Geometric Mean
AVG 6D 6 Month Average
AVG 6E 6 Hour Average
AVG 6F 6 Hour Geometric
AVG 7A 7 Day Average
AVG 7B 7 Day Geometric
AVG 7C 7 Day Median
AVG 7F 7 Day Arithmetic
AVG 7G 7 Day Arithmetic Mean
AVG 7I 7-Day Average Geometric
AVG 9B 90 Day Average
AVG 9D 96 Hour
AVG A1 Average (Data Migration)
AVG AB Annual Average
AVG AE Arithmetic Mean
AVG AF Average
AVG AG Average Below Detectable
AVG AGM Annual Geometric Mean
AVG AH Average Value
AVG AN Annual Median
AVG CA Allowed Concentration
AVG DA Daily Geometric Average
AVG DB Daily Average
AVG DF Daily Median
AVG DG Discharge Per Day Average
AVG DH Discharge per Day Geometric
AVG DM Daily Geometric
AVG DP 14 Day Average
AVG G5 5 Day Geometric Mean
AVG GA Geometric Mean
AVG HA High 7 Day Average
AVG HB High Weekly Average
AVG LA Logarithmic Mean
AVG LB Logarithmic Monthly Median
AVG M3 Monthly Median
AVG M4 Monthly Average Geometric
AVG MC Mean
AVG MD Median
AVG MK Monthly Average
AVG ML Monthly Geometric
AVG MM Monthly Geometric Mean
AVG NA Non-Specific Average
AVG QA Quarterly Average
AVG QR Quarterly Rolling Average
AVG RA Rolling Average
AVG RB Reported Average
AVG RE Indiv 12 Mo Rolling Ave
AVG RF Aggregate 12 Mo Rolling Avg
AVG RM Aggregate 12 Mo Rolling Median
AVG SC Semi-Annual Average
AVG SD Single Sample Geometric
AVG WA Weekly Average
AVG WB Weekly Geometric
AVG WE Weekly Average Geometric
AVG WK Weekly Geometric Mean
AVG WL Well Average
MAX 1B 10% of Samples
MAX 2A 20% of Samples
MAX 2P 2 Hour Peak
MAX 3E 30 Day Maximum
MAX 4B 4 Day Maximum
MAX 4C 48 Hour Maximum
MAX 5A 50th Percentile
MAX 7E 7 Day Maximum
MAX 7H 75th Percentile
MAX 7J 70th Percentile
MAX 8A 80th Percentile
MAX 95P 95th Percentile
MAX 9A 90th Percentile
MAX 9C 90% of Samples
MAX AC Annual Maximum
MAX AX Annual Average Maximum
MAX DD Daily Maximum
MAX DI Discharge Per Day Maximum
MAX EX Seasonal Maximum
MAX GX Maximum Monthly Geometric Mean
MAX HX Hourly Avg Maximum
MAX IA Instantaneous Maximum
MAX M0 Maximum Value
MAX M1 Maximum 30 Day Average
MAX M2 Maximum Monthly Average
MAX M6 Maximum (Data Migration)
MAX MA Maximum Bdl
MAX MB Maximum
MAX MN Monthly Maximum
MAX MQ Maximum Daily Average
MAX MR Maximum Hourly Rate
MAX MS Maximum Weekly Average
MAX MT Maximum 7 Day Average
MAX MU Maximum 7 Day Geometric
MAX MV Maximum 7 Day Geo. Avg.
MAX MW Maximum Single Sample
MAX MX Monthly Geometric Maximum
MAX NB Non-Specific Maximum
MAX QB Quarterly Maximum
MAX RD Rpt Allowed/Rpt Actual
MAX SA Single Sample
MAX SB Single Mv Conc Sample
MAX SE Single Reading
MAX SF Successful Readings
MAX SG Single Grab
MAX SX Semi-Annual Maximum
MAX VA Value
MAX WC Weekly Maximum
MAX X1 Positive Results
MAX XA >Background
MIN 1J 1 Day Minimum
MIN 2E 24 Hour Minimum
MIN 4E 48 Hour Minimum
MIN 7D 7 Day Minimum
MIN AM Annual Average Minimum
MIN BA Median (Minimum)
MIN BB Average (Minimum)
MIN BC 90Th Percentile (Minimum)
MIN BD 70Th Percentile (Minimum)
MIN BE 50Th Percentile (Minimum)
MIN DC Daily Minimum
MIN DE Daily Average Minimum
MIN DJ Discharge Per Day Minimum
MIN DL Daily Geometric Minimum
MIN HM Hourly Avg Minimum
MIN IB Instantaneous Minimum
MIN IC Instantaneous Min. Geom
MIN M5 Minimum (Data Migration)
MIN ME Minimum
MIN MF Minimum Percent Removal
MIN MG Minimum Weekly Average
MIN MH Minimum 7 Day Average
MIN MI Minimum 7 Day Geo. Ave
MIN MJ Monthly Average Minimum
MIN MO Monthly Minimum
MIN MZ Minimum Value
MIN NS Minimum Single Sample
MIN QC Quarterly Minimum
MIN RC Reported Minimum
MIN SM Semi-Annual Minimum
MIN TM Monthly Total Minimum
MIN WD Weekly Minimum
MIN YM Yearly Minimum
TTL AA Allowed Load
TTL AD Annual Total
TTL AL Annual Mass Loading
TTL BF Cumulative Total
TTL DK Discharge Per Day Total
TTL DN Discharged
TTL ET Event Total
TTL LE Pounds Per Event
TTL MP Monthly Total
TTL MY Monthly Loading
TTL QT Quarterly Total
TTL ST Semi-Annual Total
TTL TA Total Amount Applied
TTL TB Total
TTL TC Season To Date Total
TTL WT Weekly Total
TTL YA Year-To-Date Total

STATISTICAL_BASE_MONTHLY_AVG - The data element indicating whether the statistical base code is a monthly average, non-monthly average, or neither for purposes of calculating RNC.

SUPPLEMENTAL_ADDRESS_TEXT - The name of the supplemental location for the facility.

TERMINATION_DATE - The date the permit was terminated (MM/DD/YYYY).

TMDL_INTERFACE_FLAG - This field indicates whether a Permit has received TMDL information.

UNIT_CODE -The code representing the unit of measure applicable to quantity or concentration limits and measurements as entered by the user on the DMR form.

TOTAL_DESIGN_FLOW_NMBR - This is the flow that a permitted facility was designed to accommodate, expressed as millions of gallons per day (MGD).

VALUE_QUALIFIER_CODE - The direction of the value when an alternate limit value is possible. Values may include less than, greater than, and too numerous, which are currently entered in the DMR value columns.

VALUE_RECEIVED_DATE -The date the DMR value was received by the regulatory authority.

VERSION_NMBR - The version of the permit when a modification or reissuance is applied to the permit.

VIOLATION_CODE - Violation code describing both automatically and manually detected violations.

VIOLATION_DESC - Text description of the VIOLATION_CODE.

VIOLATION_TYPE_CODE - A derived code to differentiate violation records. Valid code values are:

Code Description
C Compliance Schedule Violation
D DMR Violation
P Permit Schedule Violation
S Single Event Violation

VIOLATION_TYPE_DESC – Text description of the code value VIOLATION_TYPE_CODE.

VALUE_TYPE_CODE - The indication of the limit value type (e.g., Quantity 1, Concentration 2). Valid code values are:

Code Description
Q1 Quantity 1
Q2 Quantity 2
C1 Concentration 1
C2 Concentration 2
C3 Concentration 3

WBD_HUC12 - Hydrologic Unit Code (HUC) from the Reach Address Database (RAD), which is derived from the USGS Watershed Boundary DatasetExit. HUCs are used to classify watersheds in the United States and the Caribbean. The code consists of twelve digits which correspond to six levels of classification:

  • Region (first-level, 2-digit HUC)
  • Subregion (second-level, 4-digit HUC)
  • Basin (third-level, 6-digit HUC)
  • Subbasin (fourth-level, 8-digit HUC)
  • Watershed (fifth-level, 10-digit HUC)
  • Subwatershed (sixth-level, 12-digit HUC)

YEARQTR - (Historic Noncompliance Quarter) Indicates the fiscal year (Oct. – Sept.) and quarter that a value for HLRNC was recorded. The format is YYYYQ, where Q = 1 – 4.

ZIP - A 9-character field that contains the U.S. Postal Zone Improvement Plan (ZIP) code for the area in which the facility is located.

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