Clean Water Act discharge permit · NPDES GU0110019
APRA HARBOR WWTP, Apra Harbor Naval Base, GU: NPDES GU0110019 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 141Pollutants under a numeric limit
- 19Pollutants with an effluent exceedance
APRA HARBOR WWTP, held by US NAVY, holds NPDES permit GU0110019, which discharges to Tipalao Bay Philippine Sea. EPA’s file records it issued March 13, 2017 and expiring April 30, 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 | APRA HARBOR WWTP |
|---|---|
| Permittee as filed | US NAVY |
| NPDES ID | GU0110019 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Federal facility |
| Issued | March 13, 2017 |
| Expiration date | April 30, 2022 |
| Address | Apra Harbor Naval Base, GU 96932 |
| Receiving water | TIPALAO BAY PHILIPPINE SEA |
| SIC | 9711 – National Security |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.
Effluent limits and exceedances
- 162Pollutants on file
- 141Under a numeric limit
- 157With a violation of any kind
- 19With 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 162 are shown.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Copper, total recoverable | 2 | 494 | 371 | April 30, 2017 | 59,900% over the limit |
| Nickel, total recoverable | 2 | 322 | 234 | February 28, 2017 | 248% over the limit |
| Aluminum, total recoverable | 2 | 322 | 196 | March 31, 2011 | 1,064,900% over the limit |
| BOD, 5-day, percent removal | 2 | 136 | 113 | June 30, 2023 | 509% over the limit |
| Solids, suspended percent removal | 2 | 76 | 54 | November 30, 2024 | 237% over the limit |
| Enterococci | 4 | 86 | 41 | November 30, 2025 | 99,999% over the limit |
| Chlorine, total residual | 4 | 119 | 29 | September 30, 2023 | 292,093% over the limit |
| Solids, total suspended | 8 | 182 | 10 | June 30, 2023 | 175% over the limit |
| Zinc, total recoverable | 4 | 120 | 9 | April 30, 2020 | 3,020% over the limit |
| BOD, 5-day, 20 deg. C | 8 | 176 | 8 | September 30, 2015 | 143% over the limit |
| Nitrogen, nitrate total [as N] | 1 | 5 | 5 | June 30, 2026 | 3,350% over the limit |
| Phosphate, ortho [as P] | 1 | 5 | 5 | June 30, 2026 | 1,500% over the limit |
| Turbidity | 0 | 38 | 3 | December 31, 2009 | |
| Manganese, total recoverable | 0 | 37 | 2 | December 31, 2009 | 23,350% over the limit |
| Coliform, fecal, colony forming units | 0 | 10 | 2 | September 30, 2011 | 73% over the limit |
| Chlordane [tech mix. and metabolites] | 1 | 6 | 2 | June 30, 2026 | 4,900% over the limit |
| Coliform, fecal general | 0 | 37 | 1 | May 31, 2008 | 7% over the limit |
| 2,3,7,8-Tetrachlorodibenzo-p-dioxin | 2 | 5 | 1 | December 31, 2017 | 2,147,483,650% over the limit |
| Chlorodibromomethane | 0 | 1 | 1 | June 30, 2026 | 124% over the limit |
| Oil and grease | 0 | 158 | 0 | ||
| Flow, in conduit or thru treatment plant | 8 | 84 | 0 | ||
| Ammonia & ammonium- total | 0 | 80 | 0 | ||
| Nitrogen, ammonia total [as N] | 4 | 76 | 0 | ||
| Arsenic, total recoverable | 4 | 55 | 0 | ||
| Silver total recoverable | 1 | 55 | 0 | ||
| Cadmium, total recoverable | 1 | 55 | 0 | ||
| Mercury, total recoverable | 4 | 52 | 0 | ||
| Lead, total recoverable | 4 | 51 | 0 | ||
| Chromium, trivalent total recoverable | 0 | 51 | 0 | ||
| Chromium, hexavalent tot recoverable | 0 | 51 | 0 | ||
| pH | 4 | 42 | 0 | ||
| Selenium, total recoverable | 1 | 39 | 0 | ||
| Dichlorobromomethane | 1 | 39 | 0 | ||
| Dibromochloromethane | 1 | 39 | 0 | ||
| Chloroform | 1 | 39 | 0 | ||
| Static 20Min Chronic Dendraster excentricus | 0 | 20 | 0 | ||
| Arsenic, dissolved [as As] | 0 | 16 | 0 | ||
| Cadmium, dissolved [as Cd] | 0 | 16 | 0 | ||
| Lead, dissolved [as Pb] | 0 | 16 | 0 | ||
| Silver, dissolved [as Ag] | 0 | 16 | 0 | ||
| Chromium, hexavalent dissolved [as Cr] | 0 | 16 | 0 | ||
| Mercury, dissolved [as Hg] | 0 | 16 | 0 | ||
| Chromium, trivalent dissolved, as Cr | 0 | 16 | 0 | ||
| TU Static 20Min Chronic Strongyl. purpuratus | 0 | 14 | 0 | ||
| Static 1Hr Chronic Tripneustes Gratilla | 0 | 5 | 0 | ||
| Bromoform | 2 | 4 | 0 | ||
| Cyanide, total [as CN] | 1 | 4 | 0 | ||
| Thallium, total recoverable | 1 | 4 | 0 | ||
| Beryllium, total recoverable [as Be] | 1 | 4 | 0 | ||
| Antimony, total recoverable | 1 | 4 | 0 | ||
| 2-Methyl-4,6-dinitrophenol | 1 | 4 | 0 | ||
| Carbon tetrachloride | 1 | 4 | 0 | ||
| 1,2-Dichloroethane | 1 | 4 | 0 | ||
| Toluene | 1 | 4 | 0 | ||
| Benzene | 1 | 4 | 0 | ||
| .delta.-BHC | 1 | 4 | 0 | ||
| Acenaphthylene | 1 | 4 | 0 | ||
| Acenaphthene | 1 | 4 | 0 | ||
| Acrolein | 1 | 4 | 0 | ||
| Acrylonitrile | 1 | 4 | 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
- 6Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| September 2, 2026 | Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| September 1, 2026 | Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| August 25, 2026 | Dry-weather SSO discharge to waters of the U.S. that may endanger health or the environment | EP6 |
| June 13, 2026 | Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| January 8, 2026 | Dry-weather SSO discharge to waters of the U.S. that may endanger health or the environment | EP6 |
| December 29, 2025 | Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | 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 October 14, 2026.