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Electric Services, major discharger, Chester, Virginia. NPDES permit VA0004146 expired Sep 30, 2021; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. fahrenheit | instantaneous maximum | report only (deg F) | all year | 001 |
| Thermal Discharge | instantaneous maximum | ≤ 11.3 BTU/hr | 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 |
| Chlorine, total residual | monthly average | ≤ 22 ug/L | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ 32 ug/L | all year | 001 |
| Temperature, water deg. fahrenheit | instantaneous maximum | report only (deg F) | all year | 003 |
| Thermal Discharge | instantaneous maximum | ≤ 5.55 BTU/hr | 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 |
| Chlorine, total residual | monthly average | ≤ 11 ug/L | all year | 003 |
| Chlorine, total residual | daily maximum | ≤ 16 ug/L | all year | 003 |
| Oxygen, dissolved [DO] | daily minimum | report only (mg/L) | all year | 005 |
| pH | daily minimum | ≥ 6 SU | all year | 005 |
| pH | daily maximum | ≤ 9 SU | all year | 005 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 005 |
| Solids, total suspended | daily maximum | ≤ 100 mg/L | all year | 005 |
| Solids, total suspended | monthly average | ≤ 460 kg/d | all year | 005 |
| Solids, total suspended | daily maximum | ≤ 1530 kg/d | all year | 005 |
| Oil & Grease | monthly average | ≤ 15 mg/L | all year | 005 |
| Oil & Grease | daily maximum | ≤ 20 mg/L | all year | 005 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 005 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 005 |
| Oxygen, dissolved [DO] | daily minimum | report only (mg/L) | all year | 101 |
| pH | minimum | ≥ 6 SU | all year | 101 |
| pH | maximum | ≤ 9 SU | all year | 101 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 101 |
| Solids, total suspended | daily maximum | ≤ 88 mg/L | all year | 101 |
| Solids, total suspended | monthly average | ≤ 560 kg/d | all year | 101 |
| Solids, total suspended | daily maximum | ≤ 1670 kg/d | all year | 101 |
| Oil & Grease | monthly average | ≤ 15 mg/L | all year | 101 |
| Oil & Grease | daily maximum | ≤ 20 mg/L | all year | 101 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 110 mg/L | all year | 101 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | all year | 101 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 101 |
| Chloride [as Cl] | monthly average | ≤ 360 mg/L | all year | 101 |
| Chloride [as Cl] | daily maximum | ≤ 660 mg/L | all year | 101 |
| Arsenic, total recoverable | monthly average | ≤ 240 ug/L | all year | 101 |
| Arsenic, total recoverable | daily maximum | ≤ 440 ug/L | all year | 101 |
| Iron, total recoverable | monthly average | report only (ug/L) | all year | 101 |
| Iron, total recoverable | daily maximum | report only (ug/L) | all year | 101 |
| Selenium, total recoverable | monthly average | ≤ 7.7 ug/L | all year | 101 |
| Selenium, total recoverable | daily maximum | ≤ 14 ug/L | all year | 101 |
| Beryllium, total recoverable [as Be] | monthly average | report only (ug/L) | all year | 101 |
| Beryllium, total recoverable [as Be] | daily maximum | report only (ug/L) | all year | 101 |
| Barium, total [as Ba] | monthly average | report only (ug/L) | all year | 101 |
| Barium, total [as Ba] | daily maximum | report only (ug/L) | all year | 101 |
| Boron, total [as B] | monthly average | report only (ug/L) | all year | 101 |
| Boron, total [as B] | daily maximum | report only (ug/L) | all year | 101 |
| Chromium, trivalent [as Cr] | monthly average | ≤ 100 ug/L | all year | 101 |
| Chromium, trivalent [as Cr] | daily maximum | ≤ 190 ug/L | all year | 101 |
| Cobalt, total [as Co] | monthly average | report only (ug/L) | all year | 101 |
| Cobalt, total [as Co] | daily maximum | report only (ug/L) | all year | 101 |
| Copper, total [as Cu] | monthly average | ≤ 11 ug/L | all year | 101 |
| Copper, total [as Cu] | daily maximum | ≤ 20 ug/L | all year | 101 |
| Thallium, total [as Tl] | monthly average | ≤ .9 ug/L | all year | 101 |
| Thallium, total [as Tl] | daily maximum | ≤ .9 ug/L | all year | 101 |
| Molybdenum, total [as Mo] | monthly average | report only (ug/L) | all year | 101 |
| Molybdenum, total [as Mo] | daily maximum | report only (ug/L) | all year | 101 |
| Nickel, total recoverable | monthly average | ≤ 26 ug/L | all year | 101 |
| Nickel, total recoverable | daily maximum | ≤ 48 ug/L | all year | 101 |
| Silver total recoverable | monthly average | ≤ 2.7 ug/L | all year | 101 |
| Silver total recoverable | daily maximum | ≤ 5 ug/L | all year | 101 |
| Zinc, total recoverable | monthly average | ≤ 100 ug/L | all year | 101 |
| Zinc, total recoverable | daily maximum | ≤ 190 ug/L | all year | 101 |
| Aluminum, total recoverable | monthly average | report only (ug/L) | all year | 101 |
| Aluminum, total recoverable | daily maximum | report only (ug/L) | all year | 101 |
| Cadmium, total recoverable | monthly average | ≤ 1.4 ug/L | all year | 101 |
| Cadmium, total recoverable | daily maximum | ≤ 2.6 ug/L | all year | 101 |
| Lead, total recoverable | monthly average | ≤ 17 ug/L | all year | 101 |
| Lead, total recoverable | daily maximum | ≤ 31 ug/L | all year | 101 |
| Vanadium, total recoverable | monthly average | report only (ug/L) | all year | 101 |
| Vanadium, total recoverable | daily maximum | report only (ug/L) | all year | 101 |
| Chromium, hexavalent dissolved [as Cr] | monthly average | ≤ 17 ug/L | all year | 101 |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | ≤ 32 ug/L | all year | 101 |
| Antimony, total recoverable | monthly average | ≤ 1300 ug/L | all year | 101 |
| Antimony, total recoverable | daily maximum | ≤ 1300 ug/L | all year | 101 |
| Petrol hydrocarbons, total recoverable | daily maximum | report only (mg/L) | all year | 101 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 101 |
| Flow, in conduit or thru treatment plant | daily maximum | ≤ 5 MGD | all year | 101 |
| Chlorine, total residual | monthly average | ≤ 18 ug/L | all year | 101 |
| Chlorine, total residual | daily maximum | ≤ 32 ug/L | all year | 101 |
| Mercury, total recoverable | monthly average | ≤ 1.2 ug/L | all year | 101 |
| Mercury, total recoverable | daily maximum | ≤ 2.2 ug/L | all year | 101 |
| NOAEL Static 48Hr Acute Ceriodaphnia dubia | daily minimum | ≥ 100 % | all year | 101 |
| NOAEL Static 48Hr Acute Pimephales promelas | daily minimum | ≥ 100 % | all year | 101 |
| TU Static Renewal 7-Day Chronic Ceriodaphnia dubia | daily maximum | ≤ 2.85 tox chronic | all year | 101 |
| TU Static Renewal 7-Day Chronic Pimphales promelas | daily maximum | ≤ 2.85 tox chronic | all year | 101 |
| pH | daily minimum | ≥ 6 SU | all year | 301 |
| pH | daily maximum | ≤ 9 SU | all year | 301 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 301 |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | all year | 301 |
| Oil & Grease | monthly average | ≤ 15 mg/L | all year | 301 |
| Oil & Grease | daily maximum | ≤ 20 mg/L | all year | 301 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 235 kg/d | all year | 301 |
| Chloride [as Cl] | monthly average | ≤ 3100 mg/L | all year | 301 |
| Chloride [as Cl] | daily maximum | ≤ 3100 mg/L | all year | 301 |
| Copper, total [as Cu] | monthly average | ≤ 72 ug/L | all year | 301 |
| Copper, total [as Cu] | daily maximum | ≤ 72 ug/L | all year | 301 |
| Nickel, total recoverable | monthly average | ≤ 230 ug/L | all year | 301 |
| Nickel, total recoverable | daily maximum | ≤ 230 ug/L | all year | 301 |
| Zinc, total recoverable | monthly average | ≤ 900 ug/L | all year | 301 |
| Zinc, total recoverable | daily maximum | ≤ 900 ug/L | all year | 301 |
| Heptachlor | monthly average | report only (ug/L) | all year | 301 |
| Heptachlor | daily maximum | report only (ug/L) | all year | 301 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 301 |
| Flow, in conduit or thru treatment plant | daily maximum | ≤ 6 MGD | all year | 301 |
| Chlorine, total residual | monthly average | ≤ 180 ug/L | all year | 301 |
| Chlorine, total residual | daily maximum | ≤ 180 ug/L | all year | 301 |
| pH | daily minimum | report only (SU) | all year | 302 |
| pH | daily maximum | report only (SU) | all year | 302 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 302 |
| Solids, total suspended | daily maximum | ≤ 100 mg/L | all year | 302 |
| Solids, total suspended | monthly average | ≤ 12 kg/d | all year | 302 |
| Solids, total suspended | daily maximum | ≤ 42 kg/d | all year | 302 |
| Oil & Grease | monthly average | ≤ 15 mg/L | all year | 302 |
| Oil & Grease | daily maximum | ≤ 20 mg/L | all year | 302 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | 302 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 302 |
| Arsenic, total recoverable | monthly average | report only (ug/L) | all year | 302 |
| Arsenic, total recoverable | daily maximum | report only (ug/L) | all year | 302 |
| Selenium, total recoverable | monthly average | report only (ug/L) | all year | 302 |
| Selenium, total recoverable | daily maximum | report only (ug/L) | all year | 302 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 302 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 302 |
| Mercury, total recoverable | monthly average | report only (ng/L) | all year | 302 |
| Mercury, total recoverable | daily maximum | report only (ng/L) | all year | 302 |
| pH | daily minimum | report only (SU) | all year | 303 |
| pH | daily maximum | report only (SU) | all year | 303 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 303 |
| Solids, total suspended | daily maximum | ≤ 100 mg/L | all year | 303 |
| Oil & Grease | monthly average | ≤ 15 mg/L | all year | 303 |
| Oil & Grease | daily maximum | ≤ 20 mg/L | all year | 303 |
| Copper, total [as Cu] | monthly average | ≤ 1 mg/L | all year | 303 |
| Copper, total [as Cu] | daily maximum | ≤ 1 mg/L | all year | 303 |
| Iron, total [as Fe] | monthly average | ≤ 1 mg/L | all year | 303 |
| Iron, total [as Fe] | daily maximum | ≤ 1 mg/L | all year | 303 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 303 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 303 |
| pH | daily minimum | report only (SU) | all year | 304 |
| pH | daily maximum | report only (SU) | all year | 304 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 304 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 304 |
| Solids, total suspended | daily maximum | ≤ 100 mg/L | all year | 304 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 304 |
| Oil & Grease | monthly average | ≤ 15 mg/L | all year | 304 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 304 |
| Oil & Grease | daily maximum | ≤ 20 mg/L | all year | 304 |
| Oil & Grease | daily maximum | report only (mg/L) | all year | 304 |
| Arsenic, total recoverable | monthly average | ≤ 8 ug/L | all year | 304 |
| Arsenic, total recoverable | monthly average | report only (ug/L) | all year | 304 |
| Arsenic, total recoverable | daily maximum | ≤ 11 ug/L | all year | 304 |
| Arsenic, total recoverable | daily maximum | report only (ug/L) | all year | 304 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 304 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 304 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 304 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 304 |
| Mercury, total recoverable | monthly average | ≤ 356 ng/L | all year | 304 |
| Mercury, total recoverable | monthly average | report only (ng/L) | all year | 304 |
| Mercury, total recoverable | daily maximum | ≤ 788 ng/L | all year | 304 |
| Mercury, total recoverable | daily maximum | report only (ng/L) | all year | 304 |
Cited limits by parameter: Virginia's rules and the federal ones.
Same industry: the 24 Electric Services permits in Virginia.
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On EPA ECHO: Facility report · DMR history
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