Clean Water Act discharge permit · NPDES AL0023086
CLIFTON C. WILLIAMS WWTP, Mobile, AL: NPDES AL0023086 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 17Pollutants under a numeric limit
- 10Pollutants with an effluent exceedance
CLIFTON C. WILLIAMS WWTP, held by MOBILE CITY OF W AND S COMM, holds NPDES permit AL0023086, which discharges to Mobile Bay. EPA’s file records it issued November 30, 2010 and expiring November 30, 2015. 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 | CLIFTON C. WILLIAMS WWTP |
|---|---|
| Permittee as filed | MOBILE CITY OF W AND S COMM |
| NPDES ID | AL0023086 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | November 30, 2010 |
| Expiration date | November 30, 2015 |
| Issuing agency | ADEM |
| Address | Mobile, AL 36603 |
| Receiving water | MOBILE BAY |
| Subwatershed | Tensaw River-Apalachee River (HUC 031602040505) |
| Other EPA IDs (FRS) | RCRA handler ALR000023317; ICIS-AIR source AL0000000109700141 |
Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 35Pollutants on file
- 17Under a numeric limit
- 34With a violation of any kind
- 10With 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 | 10 | 44 | 31 | June 30, 2026 | 252% over the limit |
| Nitrogen, ammonia total [as N] | 6 | 31 | 25 | May 31, 2026 | 57% over the limit |
| Enterococci: group D, MF trans, M-E, EIA | 6 | 26 | 24 | May 31, 2026 | 780% over the limit |
| Solids, suspended percent removal | 1 | 13 | 11 | June 30, 2026 | 85% over the limit |
| BOD, 5-day, 20 deg. C | 0 | 13 | 3 | May 31, 2007 | 281% over the limit |
| pH | 5 | 6 | 2 | June 30, 2026 | |
| Coliform, fecal general | 0 | 3 | 1 | January 31, 2000 | 110% over the limit |
| Pass/Fail Static Renewal 7Day Chronic Cyprinodon variegatus | 0 | 3 | 1 | September 30, 2023 | |
| Toxicity [chronic], Ceriodaphnia dubia | 1 | 1 | 1 | June 30, 2019 | 2,147,483,650% over the limit |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | 1 | 1 | 1 | December 31, 2006 | 99,999% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 10 | 8 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 6 | 4 | 0 | ||
| Nitrite + Nitrate total [as N] | 6 | 4 | 0 | ||
| Phosphorus, total [as P] | 6 | 4 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 4 | 0 | ||
| Chlorine, total residual | 3 | 4 | 0 | ||
| Mercury, total recoverable | 2 | 4 | 0 | ||
| Hardness, total [as CaCO3] | 0 | 2 | 0 | ||
| Oxygen, dissolved [DO] | 3 | 1 | 0 | ||
| BOD, carb-5 day, 20 deg C, percent removal | 1 | 1 | 0 | ||
| Cyanide, total [as CN] | 0 | 1 | 0 | ||
| Arsenic, dissolved [as As] | 0 | 1 | 0 | ||
| Cadmium, dissolved [as Cd] | 0 | 1 | 0 | ||
| Chromium, dissolved [as Cr] | 0 | 1 | 0 | ||
| Chromium, hexavalent [as Cr] | 0 | 1 | 0 | ||
| Copper, dissolved [as Cu] | 0 | 1 | 0 | ||
| Lead, dissolved [as Pb] | 0 | 1 | 0 | ||
| Nickel, dissolved [as Ni] | 0 | 1 | 0 | ||
| Silver, dissolved [as Ag] | 0 | 1 | 0 | ||
| Zinc, dissolved [as Zn] | 0 | 1 | 0 | ||
| Mercury, dissolved [as Hg] | 0 | 1 | 0 | ||
| BOD, 5-day, percent removal | 0 | 1 | 0 | ||
| %Effect Static Renewal 48Hr Acute Pimephales promelas | 0 | 1 | 0 | ||
| Pass/Fail Static Chronic Arbacia punctulata | 0 | 1 | 0 | ||
| Oil and grease | 2 | 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
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES AL0023086.
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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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID AL0023086 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.