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Sewage treatment plant, major discharger, Newport, Rhode Island. NPDES permit RI0100293 expired May 31, 2020; its limits still apply. Last 12 months: over a limit 6 times (last July 2026), 2 of 52 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| March 2026 | Solids, suspended percent removal, minimum | 78.4 % | ≥ 85 % | 44% |
| June 2026 | BOD, 5-day, 20 deg. C, daily maximum | 162 mg/L | ≤ 50 mg/L | 224% |
| June 2026 | BOD, 5-day, 20 deg. C, daily maximum | 7755 lb/d | ≤ 4879 lb/d | 59% |
| June 2026 | BOD, 5-day, 20 deg. C, monthly average | 32 mg/L | ≤ 30 mg/L | 7% |
| June 2026 | Solids, total suspended, daily maximum | 70 mg/L | ≤ 50 mg/L | 40% |
| July 2026 | BOD, 5-day, 20 deg. C, weekly average | 68 mg/L | ≤ 45 mg/L | 51% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 50 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 2927 lb/d | all year | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 4879 lb/d | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | weekly average | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | report only (lb/d) | all year | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (lb/d) | all year | 001 |
| pH | minimum | ≥ 6 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | weekly average | ≤ 45 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | all year | 001 |
| Solids, total suspended | monthly average | ≤ 2927 lb/d | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 4879 lb/d | all year | 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 | daily maximum | report only (mg/L) | all year | 001 |
| Oil & Grease | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | May–Oct | 001 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | May–Oct | 001 |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | May–Oct | 001 |
| Ammonia nitrogen, total, [as N] 30 day | monthly average | report only (mg/L) | all year | 001 |
| Ammonia nitrogen, total, [as N] 30 day | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, nitrite total [as N] | monthly average | report only (mg/L) | May–Oct | 001 |
| Nitrogen, nitrite total [as N] | daily maximum | report only (mg/L) | May–Oct | 001 |
| Nitrogen, nitrate total [as N] | monthly average | report only (mg/L) | May–Oct | 001 |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | May–Oct | 001 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | May–Oct | 001 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | May–Oct | 001 |
| Cyanide, total [as CN] | monthly average | report only (ug/L) | all year | 001 |
| Cyanide, total [as CN] | 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 |
| 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 |
| 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 |
| 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 |
| Ultraviolet light intensity | minimum | report only (mW/cm2) | all year | 001 |
| Ultraviolet light intensity | average | report only (mW/cm2) | all year | 001 |
| Ultraviolet light intensity | maximum | report only (mW/cm2) | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | ≤ 16 MGD | all year | 001 |
| Flow, in conduit or thru treatment plant | annual average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | ≤ 16 MGD | all year | 001 |
| Flow, in conduit or thru treatment plant | annual average | ≤ 13.1 MGD | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | ≤ 19.7 MGD | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | ≤ 30 MGD | all year | 001 |
| Ultraviolet light transmittance | minimum | report only (%) | all year | 001 |
| Ultraviolet light transmittance | average | report only (%) | all year | 001 |
| Ultraviolet light transmittance | maximum | report only (%) | all year | 001 |
| Enterococci | monthly average | report only (CFU/100mL) | all year | 001 |
| Enterococci | monthly average | ≤ 35 CFU/100mL | all year | 001 |
| Enterococci | daily maximum | report only (CFU/100mL) | all year | 001 |
| Enterococci | daily maximum | ≤ 276 CFU/100mL | all year | 001 |
| Ultraviolet light dosage | minimum | report only (mW-sec/cm2) | all year | 001 |
| Ultraviolet light dosage | average | report only (mW-sec/cm2) | all year | 001 |
| Ultraviolet light dosage | maximum | report only (mW-sec/cm2) | all year | 001 |
| Coliform, fecal general | monthly geometric mean | ≤ 200 MPN/100mL | all year | 001 |
| Coliform, fecal general | monthly average | report only (MPN/100mL) | all year | 001 |
| Coliform, fecal general | daily maximum | ≤ 400 MPN/100mL | all year | 001 |
| Coliform, fecal general | daily maximum | report only (MPN/100mL) | all year | 001 |
| BOD, 5-day, percent removal | minimum | ≥ 85 % | all year | 001 |
| Solids, suspended percent removal | minimum | ≥ 85 % | all year | 001 |
| LC50 Static Renewal 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | daily minimum | ≥ 100 % | Mar, Jun, Sep, Dec | 001 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 007 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 007 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 007 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 007 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 007 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 007 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 007 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 007 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 007 |
| Oil & Grease | daily maximum | report only (mg/L) | all year | 007 |
| Chlorine, total residual | monthly average | report only (ug/L) | all year | 007 |
| Chlorine, total residual | daily maximum | report only (ug/L) | all year | 007 |
| Flow, total | daily maximum | report only (Mgal) | all year | 007 |
| Flow, total | daily maximum | report only (Mgal) | all year | 007 |
| Enterococci | monthly average | report only (CFU/100mL) | all year | 007 |
| Enterococci | daily maximum | report only (CFU/100mL) | all year | 007 |
| Coliform, fecal general | monthly average | report only (MPN/100mL) | all year | 007 |
| Coliform, fecal general | daily maximum | report only (MPN/100mL) | all year | 007 |
| BOD, 5-day, percent removal | monthly average | ≤ 35 % | all year | 007 |
| Solids, suspended percent removal | monthly average | ≤ 50 % | all year | 007 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 010 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 010 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 010 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 010 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 010 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 010 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 010 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 010 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 010 |
| Oil & Grease | daily maximum | report only (mg/L) | all year | 010 |
| Chlorine, total residual | monthly average | report only (ug/L) | all year | 010 |
| Chlorine, total residual | monthly average | report only (ug/L) | all year | 010 |
| Chlorine, total residual | daily maximum | report only (ug/L) | all year | 010 |
| Chlorine, total residual | daily maximum | ≤ 20 ug/L | all year | 010 |
| Flow, total | daily maximum | report only (Mgal) | all year | 010 |
| Flow, total | daily maximum | report only (Mgal) | all year | 010 |
| Enterococci | monthly average | report only (CFU/100mL) | all year | 010 |
| Enterococci | monthly average | report only (CFU/100mL) | all year | 010 |
| Enterococci | daily maximum | report only (CFU/100mL) | all year | 010 |
| Enterococci | daily maximum | ≤ 276 CFU/100mL | all year | 010 |
| Coliform, fecal general | monthly average | report only (MPN/100mL) | all year | 010 |
| Coliform, fecal general | daily maximum | report only (MPN/100mL) | all year | 010 |
| BOD, 5-day, percent removal | monthly average | report only (%) | all year | 010 |
| Solids, suspended percent removal | monthly average | report only (%) | all year | 010 |
Cited limits by parameter: Rhode Island's rules and the federal ones.
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On EPA ECHO: Facility report · DMR history
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