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Sewage treatment plant, major discharger, Smithfield, Rhode Island. NPDES permit RI0100251 expired Jun 30, 2026; its limits still apply. Last 12 months: over a limit 2 times (last September 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| June 2026 | Chloroform, monthly average | 57.1 ug/L | ≤ 43.9 ug/L | 30% |
| September 2026 | NOEL Static Renewal 7Day Chronic Ceriodaphnia dubia, minimum | 25 % | ≥ 65 % | 62% |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| pH | minimum | ≥ 6.5 SU | all year |
| pH | maximum | ≤ 9 SU | all year |
| Solids, total suspended | monthly average | ≤ 15 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| Solids, total suspended | monthly average | ≤ 15 mg/L | May–Oct |
| Solids, total suspended | weekly average | ≤ 25 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| Solids, total suspended | weekly average | ≤ 20 mg/L | May–Oct |
| Solids, total suspended | daily maximum | ≤ 25 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| Solids, total suspended | daily maximum | ≤ 25 mg/L | May–Oct |
| Solids, total suspended | monthly average | ≤ 437 lb/d | Jan, Feb, Mar, Apr, Nov, Dec |
| Solids, total suspended | monthly average | ≤ 437 lb/d | May–Oct |
| Solids, total suspended | daily maximum | ≤ 729 lb/d | Jan, Feb, Mar, Apr, Nov, Dec |
| Solids, total suspended | daily maximum | ≤ 729 lb/d | May–Oct |
| Solids, total suspended | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec |
| Solids, total suspended | monthly average | report only (mg/L) | May–Oct |
| Solids, total suspended | weekly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec |
| Solids, total suspended | weekly average | report only (mg/L) | May–Oct |
| Solids, total suspended | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec |
| Solids, total suspended | daily maximum | report only (mg/L) | May–Oct |
| Solids, total suspended | monthly average | report only (lb/d) | Jan, Feb, Mar, Apr, Nov, Dec |
| Solids, total suspended | monthly average | report only (lb/d) | May–Oct |
| Solids, total suspended | daily maximum | report only (lb/d) | Jan, Feb, Mar, Apr, Nov, Dec |
| Solids, total suspended | daily maximum | report only (lb/d) | May–Oct |
| Solids, settleable | weekly average | report only (mL/L) | all year |
| Solids, settleable | daily maximum | report only (mL/L) | all year |
| Oil & Grease | daily maximum | report only (mg/L) | all year |
| Nitrogen, total [as N] | monthly average | ≤ 10 mg/L | May–Oct |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | May–Oct |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | May–Oct |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 11.2 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 3 mg/L | May–Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 68 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 40.4 mg/L | May–Oct |
| Nitrogen, nitrite total [as N] | monthly average | report only (mg/L) | May–Oct |
| Nitrogen, nitrite total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, nitrite total [as N] | daily maximum | report only (mg/L) | May–Oct |
| Nitrogen, nitrite total [as N] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, nitrate total [as N] | monthly average | report only (mg/L) | May–Oct |
| Nitrogen, nitrate total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | May–Oct |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | May–Oct |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | May–Oct |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec |
| Phosphorus, total [as P] | monthly average | ≤ 1 mg/L | Jan, Feb, Mar, Nov, Dec |
| Phosphorus, total [as P] | monthly average | ≤ .1 mg/L | Apr–Oct |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Nov, Dec |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | Apr–Oct |
| Cyanide, total [as CN] | monthly average | ≤ 7.1 ug/L | all year |
| Cyanide, total [as CN] | daily maximum | ≤ 30.2 ug/L | all year |
| Cadmium, total [as Cd] | monthly average | report only (ug/L) | all year |
| Cadmium, total [as Cd] | daily maximum | report only (ug/L) | all year |
| Copper, total [as Cu] | monthly average | report only (ug/L) | all year |
| Copper, total [as Cu] | daily maximum | report only (ug/L) | all year |
| Iron, total [as Fe] | monthly average | report only (ug/L) | all year |
| Iron, total [as Fe] | daily maximum | report only (ug/L) | all year |
| Lead, total [as Pb] | monthly average | ≤ .96 ug/L | all year |
| Lead, total [as Pb] | daily maximum | ≤ 27.1 ug/L | all year |
| Nickel, total [as Ni] | monthly average | report only (ug/L) | all year |
| Nickel, total [as Ni] | daily maximum | report only (ug/L) | all year |
| Zinc, total [as Zn] | monthly average | ≤ 54.4 ug/L | all year |
| Zinc, total [as Zn] | daily maximum | ≤ 65 ug/L | all year |
| Aluminum, total [as Al] | monthly average | report only (ug/L) | all year |
| Aluminum, total [as Al] | daily maximum | report only (ug/L) | all year |
| Chloroform | monthly average | ≤ 43.9 ug/L | all year |
| Chloroform | daily maximum | ≤ 1982 ug/L | all year |
| Flow, in conduit or thru treatment plant | monthly average | ≤ 3.5 MGD | all year |
| Chlorine, total residual | monthly average | ≤ 20 ug/L | all year |
| Chlorine, total residual | daily maximum | ≤ 32.6 ug/L | all year |
| Phosphorus, ortho | monthly average | report only (mg/L) | Jan, Feb, Mar, Nov, Dec |
| Phosphorus, ortho | daily maximum | report only (mg/L) | Jan, Feb, Mar, Nov, Dec |
| Enterococci | monthly average | ≤ 54 CFU/100mL | all year |
| Enterococci | daily maximum | ≤ 175 CFU/100mL | all year |
| Coliform, fecal general | monthly average | report only (MPN/100mL) | all year |
| Coliform, fecal general | daily maximum | report only (MPN/100mL) | all year |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 10 mg/L | May–Oct |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 15 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 15 mg/L | May–Oct |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 25 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 17 mg/L | May–Oct |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 25 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 292 lb/d | May–Oct |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 437 lb/d | Jan, Feb, Mar, Apr, Nov, Dec |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 496 lb/d | May–Oct |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 729 lb/d | Jan, Feb, Mar, Apr, Nov, Dec |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (mg/L) | May–Oct |
| BOD, carbonaceous [5 day, 20 C] | weekly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec |
| BOD, carbonaceous [5 day, 20 C] | weekly average | report only (mg/L) | May–Oct |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | May–Oct |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (lb/d) | Jan, Feb, Mar, Apr, Nov, Dec |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (lb/d) | May–Oct |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (lb/d) | Jan, Feb, Mar, Apr, Nov, Dec |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (lb/d) | May–Oct |
| BOD, carbonaceous, percent removal | minimum | ≥ 85 % | all year |
| Solids, suspended percent removal | minimum | ≥ 85 % | all year |
| LC50 Static Renewal 48Hr Acute Ceriodaphnia dubia | minimum | ≥ 100 % | all year |
| NOEL Static Renewal 7Day Chronic Ceriodaphnia dubia | minimum | ≥ 65 % | all year |
| IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubia | minimum | report only (%) | all year |
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/RI0100251 · MCP: https://passage-data.com/mcp