Clean Water Act discharge permit · NPDES GU0020168
MARINE LABORATORY, Mangilao, GU: NPDES GU0020168 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 8Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
MARINE LABORATORY, held by UNIVERSITY OF GUAM, holds NPDES permit GU0020168, which discharges to Pacific Ocean. EPA’s file records it issued June 12, 2006 and expiring July 14, 2011. 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 | MARINE LABORATORY |
|---|---|
| Permittee as filed | UNIVERSITY OF GUAM |
| NPDES ID | GU0020168 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | June 12, 2006 |
| Expiration date | July 14, 2011 |
| Address | Mangilao, GU 96923 |
| Receiving water | PACIFIC OCEAN |
| SIC | 8422 – Botanical And Zoological Gardens |
| Other EPA IDs (FRS) | RCRA handler GU0000286427 |
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
- 136Pollutants on file
- 8Under a numeric limit
- 136With a violation of any kind
- 3With 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 136 are shown.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Solids, total suspended | 4 | 128 | 12 | June 30, 2016 | 446% over the limit |
| pH | 4 | 122 | 2 | September 30, 2009 | |
| Nitrogen, nitrate [NO3], [water] | 4 | 87 | 1 | March 31, 2016 | 99,999% over the limit |
| Flow, in conduit or thru treatment plant | 4 | 372 | 0 | ||
| Temperature, water deg. centigrade | 2 | 164 | 0 | ||
| Phosphate, ortho [as PO4] | 3 | 93 | 0 | ||
| Salinity | 2 | 60 | 0 | ||
| BOD, 5-day, 20 deg. C | 3 | 27 | 0 | ||
| Enterococci | 0 | 18 | 0 | ||
| Cyanide, total [as CN] | 0 | 1 | 0 | ||
| Asbestos | 0 | 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 | ||
| Copper, total recoverable | 0 | 1 | 0 | ||
| Antimony, total recoverable | 0 | 1 | 0 | ||
| 2-Methyl-4,6-dinitrophenol | 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 | ||
| Acenaphthene | 0 | 1 | 0 | ||
| Acrolein | 0 | 1 | 0 | ||
| Acrylonitrile | 0 | 1 | 0 | ||
| Anthracene | 0 | 1 | 0 | ||
| Benzo[b]fluoranthene | 0 | 1 | 0 | ||
| Benzo[k]fluoranthene | 0 | 1 | 0 | ||
| Benzo[a]pyrene | 0 | 1 | 0 | ||
| Bis[2-chloroethyl] ether | 0 | 1 | 0 | ||
| Bis[2-chloroethoxy]methane | 0 | 1 | 0 | ||
| Bis[2-chloroisopropyl] ether | 0 | 1 | 0 | ||
| Butyl benzyl phthalate | 0 | 1 | 0 | ||
| Chlorobenzene | 0 | 1 | 0 | ||
| Chrysene | 0 | 1 | 0 | ||
| Diethyl phthalate | 0 | 1 | 0 | ||
| Dimethyl phthalate | 0 | 1 | 0 | ||
| 1,2-Diphenylhydrazine | 0 | 1 | 0 | ||
| Endosulfan sulfate | 0 | 1 | 0 | ||
| .beta.-Endosulfan | 0 | 1 | 0 | ||
| .alpha.-Endosulfan | 0 | 1 | 0 | ||
| Endrin aldehyde | 0 | 1 | 0 | ||
| Ethylbenzene | 0 | 1 | 0 | ||
| Fluoranthene | 0 | 1 | 0 | ||
| Fluorene | 0 | 1 | 0 | ||
| Hexachlorocyclopentadiene | 0 | 1 | 0 | ||
| Hexachlorobutadiene | 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 GU0020168.
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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Start the watch
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How we handle your data → Privacy
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 GU0020168 there.
Nearby on the register
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- Every permit record in Mangilao, A to Z
- Discharge permits in Guam
- Every permit record in Guam, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.