Clean Water Act discharge permit · NPDES AL0050971
MOUNTAIN BROOK SENIOR HIGH SCHOOL, Mountain Brook, AL: NPDES AL0050971 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 13Pollutants under a numeric limit
- 10Pollutants with an effluent exceedance
MOUNTAIN BROOK SENIOR HIGH SCHOOL, held by City of Mountain Brook, holds NPDES permit AL0050971. EPA’s file records it issued February 28, 2017 and expiring February 28, 2022. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | MOUNTAIN BROOK SENIOR HIGH SCHOOL |
|---|---|
| Permittee as filed | City of Mountain Brook |
| NPDES ID | AL0050971 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | February 28, 2017 |
| Expiration date | February 28, 2022 |
| Address | Mountain Brook, AL 35223 |
| Subwatershed | Lower Cahaba River (HUC 031502020104) |
| NAICS | 221320 – Sewage Treatment Facilities |
| SIC | 4952 – Sewerage Systems |
| Other EPA IDs (FRS) | RCRA handler ALR000035246 |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 15Pollutants on file
- 13Under a numeric limit
- 15With 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 |
|---|---|---|---|---|---|
| Nitrogen, ammonia total [as N] | 4 | 88 | 48 | September 30, 2025 | 2,000% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 8 | 120 | 40 | July 31, 2026 | 223% over the limit |
| Phosphorus, total [as P] | 8 | 21 | 13 | May 31, 2026 | 167% over the limit |
| E. coli | 2 | 14 | 10 | October 31, 2024 | 99,999% over the limit |
| Oxygen, dissolved [DO] | 1 | 12 | 3 | July 31, 2026 | 15% over the limit |
| pH | 2 | 22 | 2 | March 31, 2017 | |
| Chlorine, total residual | 2 | 14 | 2 | May 31, 2007 | 500% over the limit |
| Solids, total suspended | 8 | 81 | 1 | February 28, 2018 | 64% over the limit |
| Solids, suspended percent removal | 1 | 11 | 1 | November 30, 2009 | 122% over the limit |
| BOD, carb-5 day, 20 deg C, percent removal | 1 | 1 | 1 | July 31, 2026 | 30% over the limit |
| Nitrogen, Kjeldahl, total [as N] | 4 | 28 | 0 | ||
| Nitrite + Nitrate total [as N] | 4 | 20 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 20 | 0 | ||
| Phosphate, poly [as PO4] | 0 | 20 | 0 | ||
| Coliform, fecal general | 0 | 16 | 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 AL0050971.
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.
Watch this permit
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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 AL0050971 there.
Nearby on the register
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- Every permit record in Alabama, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.