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Sewage treatment plant, major discharger, Providence, Rhode Island. NPDES permit RI0100315 expired Nov 30, 2022; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | minimum | ≥ 6 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Solids, total suspended | monthly average | ≤ 20 mg/L | May–Oct | 001 |
| Solids, total suspended | monthly average | ≤ 20 mg/L | May–Oct | 001 |
| Solids, total suspended | weekly average | ≤ 45 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Solids, total suspended | weekly average | ≤ 20 mg/L | May–Oct | 001 |
| Solids, total suspended | weekly average | ≤ 20 mg/L | May–Oct | 001 |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Solids, total suspended | daily maximum | ≤ 30 mg/L | May–Oct | 001 |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | May–Oct | 001 |
| Solids, total suspended | monthly average | ≤ 16263 lb/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Solids, total suspended | monthly average | ≤ 10842 lb/d | May–Oct | 001 |
| Solids, total suspended | monthly average | ≤ 10842 lb/d | May–Oct | 001 |
| Solids, total suspended | daily maximum | ≤ 27105 lb/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Solids, total suspended | daily maximum | ≤ 16263 lb/d | May–Oct | 001 |
| Solids, total suspended | daily maximum | ≤ 24395 lb/d | May–Oct | 001 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 001 |
| Solids, total suspended | weekly average | report only (mg/L) | all year | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 001 |
| Solids, total suspended | monthly average | report only (lb/d) | all year | 001 |
| Solids, total suspended | daily maximum | report only (lb/d) | all year | 001 |
| Solids, settleable | weekly average | report only (mL/L) | all year | 001 |
| Solids, settleable | daily maximum | report only (mL/L) | all year | 001 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 001 |
| Oil & Grease | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | monthly average | ≤ 5 mg/L | May–Oct | 001 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | May–Oct | 001 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, total [as N] | monthly average | ≤ 2711 lb/d | May–Oct | 001 |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, nitrite total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, nitrite total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, nitrate total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 001 |
| Arsenic, total [as As] | monthly average | ≤ 5.4 ug/L | all year | 001 |
| Arsenic, total [as As] | daily maximum | ≤ 306.3 ug/L | all year | 001 |
| Arsenic, total [as As] | monthly average | report only (ug/L) | all year | 001 |
| Arsenic, total [as As] | daily maximum | report only (ug/L) | all year | 001 |
| Cadmium, total [as Cd] | monthly average | report only (ug/L) | all year | 001 |
| Cadmium, total [as Cd] | daily maximum | report only (ug/L) | all year | 001 |
| Cadmium, total [as Cd] | monthly average | report only (ug/L) | all year | 001 |
| Cadmium, total [as Cd] | daily maximum | report only (ug/L) | all year | 001 |
| Chromium, hexavalent [as Cr] | monthly average | report only (ug/L) | all year | 001 |
| Chromium, hexavalent [as Cr] | daily maximum | report only (ug/L) | all year | 001 |
| Chromium, hexavalent [as Cr] | monthly average | report only (ug/L) | all year | 001 |
| Chromium, hexavalent [as Cr] | daily maximum | report only (ug/L) | all year | 001 |
| Copper, total [as Cu] | monthly average | ≤ 24.5 ug/L | all year | 001 |
| Copper, total [as Cu] | daily maximum | ≤ 24.5 ug/L | all year | 001 |
| Copper, total [as Cu] | monthly average | report only (ug/L) | all year | 001 |
| Copper, total [as Cu] | daily maximum | report only (ug/L) | all year | 001 |
| Lead, total [as Pb] | monthly average | report only (ug/L) | all year | 001 |
| Lead, total [as Pb] | daily maximum | report only (ug/L) | all year | 001 |
| Lead, total [as Pb] | monthly average | report only (ug/L) | all year | 001 |
| Lead, total [as Pb] | daily maximum | report only (ug/L) | all year | 001 |
| Nickel, total [as Ni] | monthly average | ≤ 127 ug/L | all year | 001 |
| Nickel, total [as Ni] | daily maximum | ≤ 331 ug/L | all year | 001 |
| Nickel, total [as Ni] | monthly average | report only (ug/L) | all year | 001 |
| Nickel, total [as Ni] | daily maximum | report only (ug/L) | all year | 001 |
| Zinc, total [as Zn] | monthly average | report only (ug/L) | all year | 001 |
| Zinc, total [as Zn] | daily maximum | report only (ug/L) | all year | 001 |
| Zinc, total [as Zn] | monthly average | report only (ug/L) | all year | 001 |
| Zinc, total [as Zn] | daily maximum | report only (ug/L) | all year | 001 |
| Aluminum, total [as Al] | monthly average | report only (ug/L) | all year | 001 |
| Aluminum, total [as Al] | daily maximum | report only (ug/L) | all year | 001 |
| Aluminum, total [as Al] | monthly average | report only (ug/L) | all year | 001 |
| Aluminum, total [as Al] | daily maximum | report only (ug/L) | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | ≤ 65 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 | 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 | ≤ 65 ug/L | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ 65 ug/L | all year | 001 |
| Cyanide, free available | monthly average | ≤ 10 ug/L | all year | 001 |
| Cyanide, free available | daily maximum | ≤ 10 ug/L | all year | 001 |
| Cyanide, free available | monthly average | report only (ug/L) | all year | 001 |
| Cyanide, free available | daily maximum | report only (ug/L) | all year | 001 |
| Enterococci | monthly geometric mean | ≤ 35 MPN/100mL | all year | 001 |
| Enterococci | daily geometric mean | ≤ 276 MPN/100mL | all year | 001 |
| Coliform, fecal general | monthly geometric mean | report only (MPN/100mL) | all year | 001 |
| Coliform, fecal general | weekly geometric mean | report only (MPN/100mL) | all year | 001 |
| Coliform, fecal general | daily maximum | report only (MPN/100mL) | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 25 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 10 mg/L | May–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 20 mg/L | May–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 40 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 10 mg/L | May–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 20 mg/L | May–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 45 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 15 mg/L | May–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 30 mg/L | May–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 13553 lb/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 5421 lb/d | May–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 10842 lb/d | May–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 24395 lb/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 8132 lb/d | May–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 16263 lb/d | May–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (mg/L) | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | report only (mg/L) | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (lb/d) | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (lb/d) | all year | 001 |
| BOD, carb-5 day, 20 deg C, percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| LC50 Static Renewal 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | minimum | ≥ 100 % | all year | 001 |
| NOEL Static 1Hr 20min Fert. Chronic Arbacia punctulata | minimum | report only (%) | all year | 001 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 002 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | ≤ 123 MGD | all year | 002 |
| Chlorine, total residual | monthly average | report only (ug/L) | all year | 002 |
| Chlorine, total residual | monthly average | report only (ug/L) | all year | 002 |
| Chlorine, total residual | weekly average | report only (ug/L) | all year | 002 |
| Chlorine, total residual | daily maximum | ≤ 20 ug/L | all year | 002 |
| Chlorine, total residual | daily maximum | report only (ug/L) | all year | 002 |
| Enterococci | monthly geometric mean | report only (MPN/100mL) | all year | 002 |
| Enterococci | monthly geometric mean | report only (MPN/100mL) | all year | 002 |
| Enterococci | daily geometric mean | ≤ 276 MPN/100mL | all year | 002 |
| Enterococci | daily geometric mean | report only (MPN/100mL) | all year | 002 |
| Coliform, fecal general | monthly geometric mean | report only (MPN/100mL) | all year | 002 |
| Coliform, fecal general | daily geometric mean | report only (MPN/100mL) | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (mg/L) | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | all year | 002 |
| BOD, carb-5 day, 20 deg C, percent removal | monthly average | report only (%) | all year | 002 |
| Solids, suspended percent removal | monthly average | report only (%) | all year | 002 |
Cited limits by parameter: Rhode Island's rules and the federal ones.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/RI0100315 · MCP: https://passage-data.com/mcp