Clean Water Act discharge permit · NPDES NM0020109
SILVER CITY, TOWN OF WWTP, Grant County, NM: NPDES NM0020109 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MajorDischarger class
- 50Pollutants under a numeric limit
- 5Pollutants with an effluent exceedance
SILVER CITY, TOWN OF WWTP, held by SILVER CITY, TOWN OF, holds NPDES permit NM0020109, which discharges to San Vincente Arroyo. EPA’s file records it issued August 26, 2008 and expiring September 30, 2013. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | SILVER CITY, TOWN OF WWTP |
|---|---|
| Permittee as filed | SILVER CITY, TOWN OF |
| NPDES ID | NM0020109 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | August 26, 2008 |
| Expiration date | September 30, 2013 |
| Address | Grant County, NM 88061 |
| Receiving water | SAN VINCENTE ARROYO |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Pipeline Draw-San Vicente Draw (HUC 130302020203) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 54Pollutants on file
- 50Under a numeric limit
- 52With a violation of any kind
- 5With an effluent exceedance
An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Solids, total suspended | 4 | 45 | 9 | December 31, 2007 | 739% over the limit |
| BOD, 5-day, 20 deg. C | 4 | 40 | 8 | December 31, 2007 | 272% over the limit |
| Mercury, total [as Hg] | 4 | 30 | 3 | October 31, 2003 | 2,100% over the limit |
| Chlorine, total residual | 1 | 12 | 2 | July 31, 2003 | 789% over the limit |
| pH | 2 | 14 | 1 | February 29, 2004 | |
| Flow, in conduit or thru treatment plant | 3 | 21 | 0 | ||
| E. coli | 2 | 11 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubia | 4 | 10 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubia | 4 | 10 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelas | 4 | 9 | 0 | ||
| Vanadium, total [as V] | 0 | 9 | 0 | ||
| Arsenic, dry weight | 5 | 8 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 5 | 8 | 0 | ||
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | 4 | 8 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 4 | 8 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 4 | 8 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 4 | 8 | 0 | ||
| Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia | 4 | 8 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelas | 4 | 8 | 0 | ||
| Pass/Fail Static Renewal 7Day Chronic Pimephales promelas | 4 | 6 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 4 | 6 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 4 | 6 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 4 | 6 | 0 | ||
| Coef Of Var Static Renewal 7Day Chronic Pimephales promelas | 4 | 6 | 0 | ||
| Selenium, dry weight | 3 | 6 | 0 | ||
| Copper, dry weight | 3 | 6 | 0 | ||
| Cadmium, dry weight | 3 | 6 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 3 | 6 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 3 | 6 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 3 | 6 | 0 | ||
| Level of pathogen requirements achieved | 2 | 4 | 0 | ||
| Description of pathogen option used | 2 | 4 | 0 | ||
| Vector attraction reduction alternative used | 2 | 4 | 0 | ||
| Coliform, fecal general | 0 | 4 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 3 | 3 | 0 | ||
| Pollutant table from 503.13 | 1 | 3 | 0 | ||
| Chromium, sludge, total, dry weight [as Cr] | 2 | 2 | 0 | ||
| Polychlorinated biphenyls [PCBs] | 1 | 2 | 0 | ||
| Toxicity characteristic leaching procedure | 1 | 2 | 0 | ||
| Ann. amt sludge disposed by other method | 1 | 2 | 0 | ||
| Annual amt of sludge incinerated | 1 | 2 | 0 | ||
| Annual sludge production, total | 1 | 2 | 0 | ||
| Annual amount of sludge land applied | 1 | 2 | 0 | ||
| Annual amt. sludge disposed surface unit | 1 | 2 | 0 | ||
| Annual amt sludge disposed in landfill | 1 | 2 | 0 | ||
| Annual amt sludge transported interstate | 1 | 2 | 0 | ||
| BOD, 5-day, percent removal | 0 | 2 | 0 | ||
| Solids, suspended percent removal | 0 | 2 | 0 | ||
| Annual whole sludge application rate | 1 | 1 | 0 | ||
| Unit w/liner/leachate collection system | 1 | 1 | 0 | ||
| Unit boundary to property line distance | 1 | 1 | 0 | ||
| Compliance w/part 258 sludge requirement | 1 | 1 | 0 | ||
| Whole effluent toxicity - retest #1 | 6 | 0 | 0 | ||
| Whole effluent toxicity - retest #2 | 6 | 0 | 0 |
Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.
Inspections, violations and enforcement
- 11Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| April 9, 2021 | Permit Violations - Violation Specified in Comment | EP6 |
| April 1, 2021 | Permit Violations - Violation Specified in Comment | EP6 |
| March 21, 2021 | Permit Violations - Violation Specified in Comment | EP6 |
| January 12, 2021 | Permit Violations - Violation Specified in Comment | EP6 |
| August 2, 2019 | Permit Violations - Violation Specified in Comment | EP6 |
| April 28, 2019 | Permit Violations - Violation Specified in Comment | EP6 |
| December 21, 2018 | Permit Violations - Violation Specified in Comment | EP6 |
| May 25, 2018 | Permit Violations - Violation Specified in Comment | EP6 |
| May 3, 2018 | Permit Violations - Violation Specified in Comment | EP6 |
| February 13, 2017 | Permit Violations - Violation Specified in Comment | EP6 |
| January 28, 2017 | Permit Violations - Violation Specified in Comment | EP6 |
Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
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Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.