NPDES NM0020583 · Clean Water Act

CITY OF FARMINGTON, Farmington, NM: NPDES NM0020583 discharge permit, effluent exceedances, inspections, penalties

CITY OF FARMINGTON, Farmington, New Mexico: Individual permit NM0020583, held by FARMINGTON, CITY OF (WWTP); Publicly owned treatment works; Administratively continued; issued September 30, 2016, term to October 31, 2021; discharges to SAN JUAN RIVER; Sewage Treatment Facilities.

2 of the 32 pollutants listed for NPDES NM0020583 have no violation or effluent exceedance.

BOD, 5-day, 20 deg. C: 4 limits, 88 violations of any kind, 85 effluent exceedances, latest January 31, 2026, largest 99,999% over the limit.
E. coli: 4 limits, 82 violations of any kind, 80 effluent exceedances, latest August 31, 2025, largest 99,999% over the limit.
Solids, total dissolved: 12 limits, 80 violations of any kind, 68 effluent exceedances, latest October 31, 2016, largest 27% over the limit.
Solids, total suspended: 4 limits, 71 violations of any kind, 68 effluent exceedances, latest February 28, 2018, largest 523% over the limit.
Chlorine, total residual: 1 limit, 51 violations of any kind, 49 effluent exceedances, latest November 30, 2017, largest 15,689% over the limit.
Aluminum, total [as Al]: 0 limits, 30 violations of any kind, 24 effluent exceedances, latest February 29, 2004, largest 62% over the limit.
Coliform, fecal general: 0 limits, 26 violations of any kind, 24 effluent exceedances, latest October 31, 2010, largest 99,999% over the limit.
Cyanide, total [as CN]: 0 limits, 22 violations of any kind, 22 effluent exceedances, latest July 31, 2025, largest 302% over the limit.
pH: 2 limits, 15 violations of any kind, 13 effluent exceedances, latest October 31, 2018.
BOD, 5-day, percent removal: 1 limit, 14 violations of any kind, 2 effluent exceedances, latest February 28, 2018, largest 53% over the limit.
Solids, suspended percent removal: 1 limit, 14 violations of any kind, 2 effluent exceedances, latest February 28, 2018, largest 67% over the limit.
Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex: 2 limits, 5 violations of any kind.
LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelas: 2 limits, 5 violations of any kind.
NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex: 2 limits, 5 violations of any kind.
NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas: 2 limits, 5 violations of any kind.
Coef Of Var Static Renewal 48Hr Acute D. pulex: 2 limits, 5 violations of any kind.
Coef Of Var Static Renewal 48Hr Acute Pimephales promelas: 2 limits, 5 violations of any kind.
Flow, in conduit or thru treatment plant: 3 limits, 4 violations of any kind.
Whole effluent toxicity: 0 limits, 4 violations of any kind.
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia: 0 limits, 2 violations of any kind.
NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 0 limits, 2 violations of any kind.
NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 0 limits, 2 violations of any kind.
Pentachlorophenol: 0 limits, 1 violation of any kind.
Aldrin: 0 limits, 1 violation of any kind.
Chlordane [tech mix. and metabolites]: 0 limits, 1 violation of any kind.
Toxaphene: 0 limits, 1 violation of any kind.
Pollutant table from 503.13: 0 limits, 1 violation of any kind.
Level of pathogen requirements achieved: 0 limits, 1 violation of any kind.
Description of pathogen option used: 0 limits, 1 violation of any kind.
Vector attraction reduction alternative used: 0 limits, 1 violation of any kind.
Whole effluent toxicity - retest #1: 4 limits.
Whole effluent toxicity - retest #2: 4 limits.

November 2, 2026: Wet-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment (EP6).
November 2, 2026: Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment (EP6).
November 2, 2026: Wet-weather unanticipated prohibited bypass discharge to waters of the U.S. - endangerment (EP6).
October 14, 2026: Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment (EP6).
October 13, 2026: Wet-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment (EP6).
October 7, 2026: Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment (EP6).
October 4, 2026: Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment (EP6).
September 19, 2026: Dry-weather unanticipated prohibited bypass discharge to waters of the U.S. - endangerment (EP6).
September 11, 2026: Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment (EP6).
September 2, 2026: Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangerment (EP6).
May 4, 2026: Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment (EP6).
April 22, 2026: Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangerment (EP6).
April 16, 2026: CWA 309A AO For Compliance (EPA).
March 30, 2026: Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment (EP6).
March 24, 2026: Evaluation (E).
March 5, 2026: Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment (EP6).
February 25, 2026: Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment (EP6).
February 16, 2026: Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment (EP6).
January 28, 2026: Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment (EP6).
January 13, 2026: Effluent Violations - Unauthorized Discharge (EP6).
December 24, 2025: Effluent Violations - Unauthorized Discharge (EP6).
December 2, 2025: Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment (EP6).
October 21, 2025: Dry-weather SSO discharge to waters of the U.S. that may endanger health or the environment (EP6).
October 14, 2025: Effluent Violations - Unauthorized Discharge (EP6).
October 7, 2025: Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment (EP6).
September 19, 2025: Effluent Violations - Unauthorized Discharge (EP6).
September 5, 2025: Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment (EP6).
August 13, 2025: Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment (EP6).
August 7, 2025: Dry-weather unanticipated prohibited bypass discharge to waters of the U.S. - endangerment (EP6).
August 6, 2025: Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment (EP6).
July 31, 2025: Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment (EP6).
June 28, 2025: Dry-weather SSO discharge to waters of the U.S. that may endanger health or the environment (EP6).
June 19, 2025: Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment (EP6).
June 8, 2025: Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment (EP6).
May 8, 2025: Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment (EP6).
May 7, 2025: Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment (EP6).
May 1, 2025: Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment (EP6).
April 25, 2025: Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment (EP6).
April 15, 2025: Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment (EP6).
April 14, 2025: Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment (EP6).
April 10, 2025: Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment (EP6).
February 6, 2025: Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment (EP6).
January 21, 2025: Effluent Violations - Unauthorized Discharge (EP6).
December 23, 2024: Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment (EP6).
December 20, 2024: Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment (EP6).
December 7, 2024: Dry-weather SSO discharge to waters of the U.S. that may endanger health or the environment (EP6).
October 28, 2024: Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment (EP6).
October 20, 2024: Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment (EP6).
July 12, 2024: Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment (EP6).
June 30, 2024: Wet-weather unanticipated prohibited bypass discharge to waters of the U.S. - endangerment (EP6).
June 26, 2024: Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment (EP6).
June 17, 2024: Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment (EP6).

New Mexico holds 22 Publicly owned treatment works coverages of this permit type in EPA’s file; 7 were issued before NM0020583. FARMINGTON, CITY OF (WWTP) holds 2 permits in New Mexico.

Other permits held by FARMINGTON, CITY OF (WWTP)

FARMINGTON, CITY OF (WWTP), Farmington: NML020583, issued 2021-01-01

Coverages issued nearest NM0020583

2008-08-26: SILVER CITY, TOWN OF WWTP, Grant County: NM0020109, held by SILVER CITY, TOWN OF
2012-07-20: CLOUDCROFT, VILLAGE OF, Cloudcroft: NM0023370
2012-08-30: ALBUQUERQUE BERNALILLO COUNTY WATER UTILITY AUTHORITY, Albuquerque: NM0022250
2016-05-31: RIO RANCHO, CITY OF WWTP #2, Rio Rancho: NM0027987, held by RIO RANCHO, CITY OF
2016-07-01: SANTA FE WWTP, Santa Fe: NM0022292, held by SANTA FE, CITY OF (AIRPORT RD
2016-09-30: CASA BLANCA WWTP, Casa Blanca: NM0030678
2016-12-21: LOS ALAMOS COUNTY-WHITE ROCK P, White Rock: NM0020133, held by LOS ALAMOS COUNTY (WHITE ROCK)
2017-03-09: TOWN OF RED RIVER, Taos: NM0024899, held by RED RIVER AWWT, TOWN OF
2017-05-31: NORTHERN EDGE NAVAJO CASINO WWTP, Farmington: NN0030343, held by NAVAJO TRIBAL UTILITY AUTHORITY
2018-02-21: SHIPROCK WWTF, Shiprock: NN0020621, held by NAVAJO TRIBAL UTILITY AUTHORITY

CITY OF FARMINGTON among its neighbors

16 discharge permits are in the Ojo Amarillo Canyon-San Juan River subwatershed (HUC 140801050505); NM0020583 is one. Its county: 55, 4 major; NM0020583 is major permit.

Other permits in the Ojo Amarillo Canyon-San Juan River subwatershed (HUC 140801050505)

62 RD 6100, Kirtland: NMR1003EG
CITY OF FARMINGTON BLUFFVIEW POWER PLANT, Farmington: NMR05H610
FARMERS MUTUAL EROSION REPAIR, Farmington: NMR1007SF, minor, term to 2027-02-16
FARMINGTON, CITY OF (NMR04F001), Farmington: NMR04F001, minor, term to 2012-06-30
FEDERAL EXPRESS FMNA, Farmington: NMNOEJ03H, minor, term to 2025-10-06
FOUR CONERS REGIONAL AIRPORT, Farmington: NMR05GC99
GRADING, CONCRETE PAD, AND METAL BUILDING, Farmington: NMR1003C9
HIGHWAY 64 TRUCK & AUTO SALVAGE, Kirtland: NMR05GZ85
LIBERTY FRACK, Farmington: NMR10027U
LITTLE CREEK SUBDIVISION PHASE VIII, Farmington: NMR1004OX, minor, term to 2027-02-16

Identity

Facility	CITY OF FARMINGTON
Permittee	FARMINGTON, CITY OF (WWTP)
NPDES ID	NM0020583
Status	Administratively continued
Type	Individual permit
Class	Major
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	September 30, 2016
Expires	October 31, 2021
Address	Farmington, NM 87401
Receiving water	SAN JUAN RIVER
Subwatershed	Ojo Amarillo Canyon-San Juan River (HUC 140801050505)
Program components on file	POTW, Pretreatment
NAICS	221320 – Sewage Treatment Facilities
SIC	4952 – Sewerage Systems

NPDES NM0020583: effluent limits and exceedances

CITY OF FARMINGTON (NPDES NM0020583): 32 pollutants on file, 17 limited; 30 with a violation of any kind, 11 with an exceedance.

How exceedances are counted.

Pollutant	Limits	Violations	Exceedances	Latest	Largest, as filed
BOD, 5-day, 20 deg. C	4	88	85	January 31, 2026	99,999% over the limit
E. coli	4	82	80	August 31, 2025	99,999% over the limit
Solids, total dissolved	12	80	68	October 31, 2016	27% over the limit
Solids, total suspended	4	71	68	February 28, 2018	523% over the limit
Chlorine, total residual	1	51	49	November 30, 2017	15,689% over the limit
Aluminum, total [as Al]	0	30	24	February 29, 2004	62% over the limit
Coliform, fecal general	0	26	24	October 31, 2010	99,999% over the limit
Cyanide, total [as CN]	0	22	22	July 31, 2025	302% over the limit
pH	2	15	13	October 31, 2018
BOD, 5-day, percent removal	1	14	2	February 28, 2018	53% over the limit
Solids, suspended percent removal	1	14	2	February 28, 2018	67% over the limit
Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex	2	5	0
LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelas	2	5	0
NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex	2	5	0
NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas	2	5	0
Coef Of Var Static Renewal 48Hr Acute D. pulex	2	5	0
Coef Of Var Static Renewal 48Hr Acute Pimephales promelas	2	5	0
Flow, in conduit or thru treatment plant	3	4	0
Whole effluent toxicity	0	4	0
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia	0	2	0
NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia	0	2	0
NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia	0	2	0
Pentachlorophenol	0	1	0
Aldrin	0	1	0
Chlordane [tech mix. and metabolites]	0	1	0
Toxaphene	0	1	0
Pollutant table from 503.13	0	1	0
Level of pathogen requirements achieved	0	1	0
Description of pathogen option used	0	1	0
Vector attraction reduction alternative used	0	1	0
Whole effluent toxicity - retest #1	4	0	0
Whole effluent toxicity - retest #2	4	0	0

NPDES NM0020583: inspections, violations and enforcement

NPDES NM0020583: 92 single-event violations

The newest 50 of 92.

Date	What EPA recorded	Agency
November 2, 2026	Wet-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment	EP6
November 2, 2026	Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	EP6
November 2, 2026	Wet-weather unanticipated prohibited bypass discharge to waters of the U.S. - endangerment	EP6
October 14, 2026	Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment	EP6
October 13, 2026	Wet-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment	EP6
October 7, 2026	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	EP6
October 4, 2026	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	EP6
September 19, 2026	Dry-weather unanticipated prohibited bypass discharge to waters of the U.S. - endangerment	EP6
September 11, 2026	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	EP6
September 2, 2026	Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangerment	EP6
May 4, 2026	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	EP6
April 22, 2026	Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangerment	EP6
March 30, 2026	Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment	EP6
March 5, 2026	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	EP6
February 25, 2026	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	EP6
February 16, 2026	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	EP6
January 28, 2026	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	EP6
January 13, 2026	Effluent Violations - Unauthorized Discharge	EP6
December 24, 2025	Effluent Violations - Unauthorized Discharge	EP6
December 2, 2025	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	EP6
October 21, 2025	Dry-weather SSO discharge to waters of the U.S. that may endanger health or the environment	EP6
October 14, 2025	Effluent Violations - Unauthorized Discharge	EP6
October 7, 2025	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	EP6
September 19, 2025	Effluent Violations - Unauthorized Discharge	EP6
September 5, 2025	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	EP6
August 13, 2025	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	EP6
August 7, 2025	Dry-weather unanticipated prohibited bypass discharge to waters of the U.S. - endangerment	EP6
August 6, 2025	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	EP6
July 31, 2025	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	EP6
June 28, 2025	Dry-weather SSO discharge to waters of the U.S. that may endanger health or the environment	EP6
June 19, 2025	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	EP6
June 8, 2025	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	EP6
May 8, 2025	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	EP6
May 7, 2025	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	EP6
May 1, 2025	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	EP6
April 25, 2025	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	EP6
April 15, 2025	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	EP6
April 14, 2025	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	EP6
April 10, 2025	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	EP6
February 6, 2025	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	EP6
January 21, 2025	Effluent Violations - Unauthorized Discharge	EP6
December 23, 2024	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	EP6
December 20, 2024	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	EP6
December 7, 2024	Dry-weather SSO discharge to waters of the U.S. that may endanger health or the environment	EP6
October 28, 2024	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	EP6
October 20, 2024	Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	EP6
July 12, 2024	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	EP6
June 30, 2024	Wet-weather unanticipated prohibited bypass discharge to waters of the U.S. - endangerment	EP6
June 26, 2024	Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	EP6
June 17, 2024	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	EP6

NPDES NM0020583: 1 inspection

Date	What EPA recorded	Agency
March 24, 2026	Evaluation	E

NPDES NM0020583: 1 formal enforcement action

0 of them with a penalty assessed. How penalties are shown.

Date	What EPA recorded	Agency	Federal penalty	State or local penalty
April 16, 2026	CWA 309A AO For Compliance	EPA

NPDES NM0020583 (CITY OF FARMINGTON): no informal enforcement action on file.

Watch NPDES NM0020583

NPDES NM0020583: one email when its EPA record changes — $99/month.

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Permits near NPDES NM0020583

NPDES NM0020583: 32 pollutant rows, 94 dated events; ICIS-NPDES download, loaded October 14, 2026.