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Electric Services, major discharger, St. Thomas, the U.S. Virgin Islands. NPDES permit VI0000060, in force until Oct 31, 2029. Last 12 months: over a limit 12 times (last August 2026), 107 required values missing, 58 of 92 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| October 2025 | Arsenic, daily maximum | 8.9 ug/L | ≤ .14 ug/L | 6257% |
| October 2025 | Arsenic, monthly average | 8.9 ug/L | ≤ .28 ug/L | 3079% |
| October 2025 | Chlorine, total residual, daily maximum | .02 mg/L | ≤ .013 mg/L | 54% |
| October 2025 | Chlorine, total residual, monthly average | .02 mg/L | ≤ .0053 mg/L | 277% |
| October 2025 | Copper, dissolved [as Cu], daily maximum | 12.4 ug/L | ≤ 2.9 ug/L | 328% |
| October 2025 | Copper, dissolved [as Cu], monthly average | 12.4 ug/L | ≤ 5.8 ug/L | 114% |
| October 2025 | Nickel, dissolved [as Ni], daily maximum | 8.8 ug/L | ≤ 6.8 ug/L | 29% |
| October 2025 | Nitrogen, total [as N], daily maximum | .59 mg/L | ≤ .207 mg/L | 185% |
| October 2025 | Phosphorus, total [as P], monthly average | .072 mg/L | ≤ .05 mg/L | 44% |
| April 2026 | Oil & Grease, daily maximum | 37.9 mg/L | ≤ 10 mg/L | 279% |
| July 2026 | Oil & Grease, daily maximum | 14.6 mg/L | ≤ 10 mg/L | 46% |
| August 2026 | Oil & Grease, daily maximum | 26.9 mg/L | ≤ 10 mg/L | 169% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. centigrade | monthly average | report only (deg C) | all year | 001 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 001 |
| Temp. diff. between samp. & upstrm deg. C | 48-hour maximum | ≤ 11.1 deg C | all year | 001 |
| Temp. diff. between samp. & upstrm deg. C | monthly maximum | ≤ 8.3 deg C | all year | 001 |
| pH | minimum | ≥ 7 SU | all year | 001 |
| pH | minimum | ≥ 7 SU | all year | 001 |
| pH | maximum | ≤ 8.3 SU | all year | 001 |
| pH | maximum | ≤ 8.3 SU | all year | 001 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | all year | 001 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 001 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 001 |
| Nitrogen, total [as N] | daily maximum | ≤ .207 mg/L | all year | 001 |
| Phosphorus, total [as P] | monthly average | ≤ .05 mg/L | all year | 001 |
| Phosphorus, total [as P] | daily maximum | ≤ .1 mg/L | all year | 001 |
| Copper, dissolved [as Cu] | monthly average | ≤ 5.8 ug/L | all year | 001 |
| Copper, dissolved [as Cu] | daily maximum | ≤ 2.9 ug/L | all year | 001 |
| Nickel, dissolved [as Ni] | monthly average | ≤ 14 ug/L | all year | 001 |
| Nickel, dissolved [as Ni] | daily maximum | ≤ 6.8 ug/L | all year | 001 |
| Chromium, hexavalent dissolved [as Cr] | monthly average | ≤ 83 ug/L | all year | 001 |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | ≤ 41 ug/L | all year | 001 |
| Arsenic | monthly average | ≤ .28 ug/L | all year | 001 |
| Arsenic | daily maximum | ≤ .14 ug/L | all year | 001 |
| Whole effluent toxicity | daily maximum | report only (%) | all year | 001 |
| Priority Pollutants | daily maximum | report only (ug/L) | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Chlorine, total residual | monthly average | ≤ .0053 mg/L | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ .013 mg/L | all year | 001 |
| Oil and grease per production | daily maximum | ≤ 15 mg/L | all year | 002 |
| pH | minimum | ≥ 6.7 SU | all year | 002 |
| pH | maximum | ≤ 8.5 SU | all year | 002 |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| Oil and grease per production | daily maximum | ≤ 15 mg/L | all year | 003 |
| pH | minimum | ≥ 6.7 SU | all year | 003 |
| pH | minimum | ≥ 6.7 SU | all year | 003 |
| pH | maximum | ≤ 8.5 SU | all year | 003 |
| pH | maximum | ≤ 8.5 SU | all year | 003 |
| Solids, total suspended | daily maximum | ≤ 20 mg/L | all year | 003 |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | all year | 003 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 003 |
| Copper, total [as Cu] | monthly average | ≤ 2.9 mg/L | all year | 003 |
| Copper, total [as Cu] | daily maximum | ≤ 5.8 mg/L | all year | 003 |
| Iron, total [as Fe] | daily maximum | ≤ 1 mg/L | all year | 003 |
| Aluminum, total [as Al] | daily maximum | ≤ 3 mg/L | all year | 003 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 003 |
| Oil and grease per production | daily maximum | ≤ 15 mg/L | all year | 004 |
| pH | minimum | ≥ 6.7 SU | all year | 004 |
| pH | maximum | ≤ 8.5 SU | all year | 004 |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | all year | 004 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 004 |
| Oil and grease per production | daily maximum | ≤ 15 mg/L | all year | 005 |
| pH | minimum | ≥ 6.7 SU | all year | 005 |
| pH | maximum | ≤ 8.5 SU | all year | 005 |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | all year | 005 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 005 |
Cited limits by parameter: we hold no rule of the U.S. Virgin Islands's own; the federal ones.
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