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
• Guidance on ICIS-NPDES Downloads
• ICIS-NPDES Data Elements by Table
• ICIS-NPDES Data Element Definitions

 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.

ICIS-NPDES records included in the download files are those with any permit status code value for the current permit record. The ICIS-NPDES Master General Permits file include the current and historical permit records. ICIS-NPDES records (for all permit types except Master General Permits) 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.

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).

Top of Page

 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:

* 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.

 ICIS-NPDES Data Elements by Table

 Facility (ICIS_FACILITIES.csv)

 Permit (ICIS_PERMITS.csv) and Master General Permit (ICIS_MASTER_GENERAL_PERMITS.csv)

 Permit Components (NPDES_PERM_COMPONENTS.csv)

 Permit Feature Coordinates (NPDES_PERM_FEATURE_COORDS.csv)

 NAICS Code (NPDES_NAICS.csv)

 SIC Code (NPDES_SICS.csv)

 Inspections (NPDES_INSPECTIONS.csv)

 QNCR Historic Compliance (NPDES_QNCR_HISTORY.csv)

 Permit Schedule Violations (NPDES_PS_VIOLATIONS.csv)

 NPDES Data Groups (NPDES_DATA_GROUPS.csv)

 Compliance Schedule Violations (NPDES_CS_VIOLATIONS.csv)

 Single Event Violations (NPDES_SE_VIOLATIONS.csv)

 CWA Enforcement Actions (NPDES_FORMAL_ENFORCEMENT_ACTIONS.csv)

Top of Page

 CWA Informal Enforcement Actions (NPDES_INFORMAL_ENFORCEMENT_ACTIONS.csv)

Top of Page

DMR Violations - Effluent Exceedance and Reporting (NPDES_EFF_VIOLATIONS.csv)

 Violation Enforcement Actions (NPDES_VIOLATION_ENFORCEMENTS.csv)

This table links civil CWA enforcement actions to specific violations.

Top of Page

 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_DATE

The date on which the activity/milestone was conducted or achieved. Date format is MM/DD/YYYY.

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	Senior Environmental Employment (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 2017 FIPS Codes for Counties.

CREATED_DATE

The latest date (MM/DD/YYYY) that a NPDES data group was related to a specific version of the NPDES permit.

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 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 ICIS-NPDES. 

GEOCODE_LONGITUDE

The longitude of the facility or permit holder as maintained in ICIS-NPDES.

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
S	[SNC] Compliance/Permit Schedule - Violations	Enforcement action or permit compliance schedule event violation – more than 90 days late
E	[SNC] Effluent - Monthly Average Limit	Effluent violations of monthly average DMR limits (technical review criteria or chronic) or SNC-level single event violation
X	[SNC] Effluent - Non-monthly Average Limit	Effluent violations of non-monthly average DMR limits (technical review criteria or chronic)
T	[SNC] Compliance/Permit Schedule - Reporting	Enforcement action or permit compliance reporting violation – more than 30 days late
D	[SNC] Failure to Report DMR - Not Received	Reporting violation – non-receipt of DMR. Note: for non-major facilities, the system replaced the “D” with “W”, except for facilities in Arkansas and Louisiana for monitoring period end dates before July 1, 2017.
W	Failure to Report DMR - Not Received	Reporting violation – non-receipt of DMR for non-major facility (except those in Arkansas and Louisiana) for monitoring period end dates before July 1, 2017
N	Reportable Noncompliance	RNC - reportable noncompliance
P	Resolved Pending	An enforcement action has been issued and facility compliance with the action is pending final completion
Q	Resolved Pending - Manual	Manually entered Resolved Pending status
R	Resolved	Facility has returned to compliance with its permit conditions, either with or without issuance of an enforcement action
V	Non-RNC Violations	Facility has effluent, DMR reporting, compliance schedule, permit schedule, or single event violations but is not considered to be RNC or SNC
U	Undetermined	EPA’s data system is not able to determine the facility-level compliance status because the system has not been set to track it or because the data have not been entered. This information may be available from the state database.

ICIS_FACILITY_INTEREST_ID

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

IMPAIRED_WATERS

The impairment class or category of the water body 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.

LIMIT_VALUE_STANDARD_UNITS

The limit value expressed in standard units, as calculated by the system.

LOCATION_ADDRESS

The street address of the facility.

Top of Page

MAJOR_MINOR_STATUS_FLAG

A 1-character code that designates the facility as a major discharger (M), non-major discharger (N), or that no data is available (null value), such as for unpermitted facilities. 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. Non-major facilities are those not designated as major.

MASTER_EXTERNAL_PERMIT_NMBR

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

MONITORING_LOCATION_CODE

The code describing 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

Top of Page

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).

NODI_CODE

The no data indicator (NODI) code indicates the reason that data for an expected DMR value were not submitted by the permittee for a Monitoring Period End Date.

Code	Description
1	Wrong Flow
2	Operation Shutdown
3	Special Report Attached
4	Discharge to Lagoon/Groundwater
5	Frozen Conditions
7	No Influent
8	Other (See Comments)
9	Conditional Monitoring - Not Required This Period
A	General Permit Exemption
B	Below Detection Limit/No Detection
C	No Discharge
D	Lost Sample/Data Not Available
E	Analysis Not Conducted/No Sample
F	Insufficient Flow for Sampling
G	Sampling Equipment Failure
H	Invalid Test
I	Land Applied
J	Recycled - Water-Closed System
K	Natural Disaster
L	DMR Received but not Entered
M	Laboratory Error
N	Not Constructed
Q	Not Quantifiable
R	Administratively Resolved
S	Fire Conditions
V	Weather Related
W	Dry Lysimeter/Well
X	Parameter/Value Not Reported
Z	COVID-19

NPDES_DATA_GROUP_CODE

A 3-character code indicating the types of data the National Pollutant Discharge Elimination System (NPDES) permitted facility reports to the issuing agency. There are currently 19 NPDES data groups.

NPDES_DATA_GROUP_DESC

The description of the NPDES data group code.

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. Violations are counted if the violation's start or end date fall within the quarter. The violation start date is based on the schedule event’s due date. Violation end date is the schedule event’s actual date. If the actual data is null and the violation’s RNC resolution code is 0, 2, 5, 6, 9, or B, the RNC resolution date is used for the violation end date. If neither apply, the violation is considered ongoing.

NUMD8090Q

(Number of DMR reporting Violations in Quarter) A count of the number of DMR reporting violations (violation codes D80 and D90) in the quarter, defined by the DMR due date falling within the YEARQTR. 

NUME90Q

(Number of E90 Violations in Quarter) A count of the number of effluent violations (E90) reported in the quarter, defined by the DMR monitoring period end date falling within the 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. Violations are counted if the violation's start or end date fall within the quarter. The violation start date is based on the schedule event’s due date. Violation end date is the schedule event’s actual date. If the actual data is null and the violation’s RNC resolution code is 0, 2, 5, 6, 9, or B, the RNC resolution date is used for the violation end date. If neither apply, the violation is considered ongoing. 

NUMSVCD

(Number of Single Event Violations in Quarter) A count of the number of single event violations reported in the quarter, defined by YEARQTR. Violations are counted if the violation's start or end date fall within the quarter.

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). Active facilities are those currently in operation (indicated by any status code except NON, PND, RET, or 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).

REGISTRY_ID

See FACILITY_UIN

RETIREMENT_DATE

The date the permit was retired (YYYYMMDD).

REPORT_RECEIVED_DATE

The date on which the regulatory authority receives a report indicating a scheduled event was completed or the date on which the regulatory authority received the required report (MM/DD/YYYY).

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
0	RE - Automated Administratively Resolved (DMR Non-Receipt Violations)
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 Search Exit.

SIC_DESC

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

SINGLE_EVENT_AGENCY_TYPE_CODE

The type of organization issuing or granting the Single Event Violation. The list of codes includes:

Code	Description
EP6	U.S. EPA
ST6	State
OT6	Other - State
OTH	Other
TR6	Tribal
CT6	County
MN6	Municipal
CR6	Contractor
EO6	Other - EPA
SE6	Senior Environmental Employment (SEE) Inspector
EC6	EPA Contractor

SINGLE_EVENT_END_DATE

If the Single Event Violation occurred over multiple days, the date the occurrence ended.

SINGLE_EVENT_VIOLATION_COMMENT

Comments about the Single Event Violation.

SINGLE_EVENT_VIOLATION_DATE

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

STANDARD_UNIT_CODE

The code representing the standard unit of measure applicable to quantity or concentration limits and measurements, as entered by the user.

STANDARD_UNIT_DESC

The short description of the standard unit of measure applicable to limit or DMR values.

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. For a list of all codes and descriptions, download the Statistical Base Code Reference Table (CSV).

STATISTICAL_BASE_MONTHLY_AVG

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

STATISTICAL_BASE_SHORT_DESC

A short description for the unit of measure applicable to the limit and DMR values. For a list of all codes and descriptions, download the Statistical Base Code Reference Table (CSV).

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.

UPDATED_DATE

The latest date that the existing NPDES data group code was modified for a specific version of the NPDES Permit Identifier (MM/DD/YYYY). 

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.
Note that there may be a delay between the monitoring period associated with the DMR and the date that the regulatory authority receives the DMR. For the end date of the monitoring period associated with the DMR values, please see Monitoring_Period_End_Date.

VERSION_NMBR

The version of the permit when a modification or reissuance is applied to the permit. A "0" indicates the most recent or current permit version.

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

RAD_WBD_HUC12S

Displays the Hydrologic Unit Codes (HUC) and names associated with each NPDES permit. There may be multiple codes listed due to multiple outfalls. HUCs are sourced 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 codes consist 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.