Clean Water Act discharge permit · NPDES CA0037532
MILLBRAE WPCP, Millbrae, CA: NPDES CA0037532 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 41Pollutants under a numeric limit
- 9Pollutants with an effluent exceedance
MILLBRAE WPCP, held by Millbrae, City of, and North Bayside System Unit (NBSU), holds NPDES permit CA0037532, which discharges to Lower San Francisco Bay. EPA’s file records it issued December 11, 2013 and expiring January 31, 2019. 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 | MILLBRAE WPCP |
|---|---|
| Permittee as filed | Millbrae, City of, and North Bayside System Unit (NBSU) |
| NPDES ID | CA0037532 |
| 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 | December 11, 2013 |
| Expiration date | January 31, 2019 |
| Address | Millbrae, CA 94030 |
| Receiving water | Lower San Francisco Bay |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 168Pollutants on file
- 41Under a numeric limit
- 146With a violation of any kind
- 9With 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; the 60 with the most exceedances of 168 are shown.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| BOD, carbonaceous [5 day, 20 C] | 4 | 42 | 23 | May 31, 2025 | 104% over the limit |
| % Survival Flow Through 96Hr Acute Pimephales promelas | 2 | 16 | 10 | October 31, 2010 | 39% over the limit |
| Solids, total suspended | 4 | 28 | 8 | September 30, 2025 | 50% over the limit |
| Coliform, fecal - % samples exceeding limit | 0 | 6 | 6 | March 31, 2008 | 150% over the limit |
| Cyanide, total [as CN] | 3 | 13 | 1 | February 28, 2009 | 48% over the limit |
| Enterococci | 1 | 8 | 1 | February 28, 2009 | 6,812% over the limit |
| TU Static Renewal 7-Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 0 | 7 | 1 | December 31, 2003 | 20% over the limit |
| Solids, suspended percent removal | 1 | 4 | 1 | September 30, 2011 | 7% over the limit |
| Cyanide, weak acid, dissociable | 0 | 1 | 1 | July 31, 2006 | 12% over the limit |
| Mercury, total recoverable | 3 | 14 | 0 | ||
| Nitrogen, ammonia total [as N] | 2 | 12 | 0 | ||
| Copper, total recoverable | 2 | 7 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 6 | 0 | ||
| pH | 2 | 6 | 0 | ||
| Oil and grease | 2 | 6 | 0 | ||
| Oxygen, dissolved [DO] | 0 | 6 | 0 | ||
| TCDD equivalents | 2 | 4 | 0 | ||
| Chlorine, total residual | 1 | 4 | 0 | ||
| Temperature, water deg. centigrade | 0 | 4 | 0 | ||
| Coliform, fecal general | 2 | 3 | 0 | ||
| BOD, carb-5 day, 20 deg C, percent removal | 1 | 3 | 0 | ||
| Di[2-ethylhexyl] phthalate [DEHP] | 2 | 2 | 0 | ||
| Benzo[b]fluoranthene | 0 | 2 | 0 | ||
| Benzo[k]fluoranthene | 0 | 2 | 0 | ||
| Benzo[a]pyrene | 0 | 2 | 0 | ||
| Chrysene | 0 | 2 | 0 | ||
| Indeno[1,2,3-cd]pyrene | 0 | 2 | 0 | ||
| Isophorone | 0 | 2 | 0 | ||
| Tetrachloroethylene | 0 | 2 | 0 | ||
| Benzo[a]anthracene | 0 | 2 | 0 | ||
| Dibenz[a,h]anthracene | 0 | 2 | 0 | ||
| Aldrin | 0 | 2 | 0 | ||
| Toxaphene | 0 | 2 | 0 | ||
| Hexachlorobenzene | 0 | 2 | 0 | ||
| Polychlorinated biphenyls [PCBs] | 2 | 1 | 0 | ||
| 2,3,7,8-Tetrachlorodibenzo-p-dioxin | 1 | 1 | 0 | ||
| Arsenic, total recoverable | 0 | 1 | 0 | ||
| Selenium, total recoverable | 0 | 1 | 0 | ||
| Thallium, total recoverable | 0 | 1 | 0 | ||
| Beryllium, total recoverable [as Be] | 0 | 1 | 0 | ||
| Chromium, hexavalent [as Cr] | 0 | 1 | 0 | ||
| Chromium, trivalent [as Cr] | 0 | 1 | 0 | ||
| Nickel, total recoverable | 0 | 1 | 0 | ||
| Silver total recoverable | 0 | 1 | 0 | ||
| Zinc, total recoverable | 0 | 1 | 0 | ||
| Cadmium, total recoverable | 0 | 1 | 0 | ||
| Lead, total recoverable | 0 | 1 | 0 | ||
| Antimony, total recoverable | 0 | 1 | 0 | ||
| 2-Methyl-4,6-dinitrophenol | 0 | 1 | 0 | ||
| Tributyltin | 0 | 1 | 0 | ||
| Dichlorobromomethane | 0 | 1 | 0 | ||
| Carbon tetrachloride | 0 | 1 | 0 | ||
| 1,2-Dichloroethane | 0 | 1 | 0 | ||
| Bromoform | 0 | 1 | 0 | ||
| Dibromochloromethane | 0 | 1 | 0 | ||
| Chloroform | 0 | 1 | 0 | ||
| Toluene | 0 | 1 | 0 | ||
| Benzene | 0 | 1 | 0 | ||
| .delta.-BHC | 0 | 1 | 0 | ||
| Acenaphthylene | 0 | 1 | 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 CA0037532.
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.