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Town of Bristol C/O Bristol Town Hall

Sewage treatment plant, major discharger, Bristol, Rhode Island. NPDES permit RI0100005, in force until Mar 31, 2028. Last 12 months: over a limit 10 times (last September 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (44 values), form IF quarterly (40 values), form Q quarterly (58 values), form T quarterly (1 value)
Renewal application due
Oct 3, 2027 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
7 values over a limit, 0 required values missing, 0 of 24 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimitOver by
October 2025Chlorine, total residual, daily maximum1180 ug/L≤ 364 ug/L224%
March 2026BOD, 5-day, percent removal, minimum84.2 %≥ 85 %5%
March 2026Flow, in conduit or thru treatment plant, monthly average6.62 MGD≤ 3.79 MGD75%
March 2026Solids, suspended percent removal, minimum76.1 %≥ 85 %59%
April 2026pH, minimum6.2 SU≥ 6.5 SU—
May 2026pH, minimum6.3 SU≥ 6.5 SU—
August 2026Enterococci, daily maximum24000000 CFU/100mL≤ 276 CFU/100mL—
September 2026BOD, 5-day, percent removal, minimum84.3 %≥ 85 %5%
September 2026Enterococci, daily maximum399.8 CFU/100mL≤ 276 CFU/100mL45%
September 2026Solids, suspended percent removal, minimum84.3 %≥ 85 %5%

Limits in force (152)

ParameterStatisticLimitMonths
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 50 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 948 lb/dall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 1580 lb/dall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cweekly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year
BOD, 5-day, 20 deg. Cmonthly averagereport only (lb/d)all year
BOD, 5-day, 20 deg. Cdaily maximumreport only (lb/d)all year
pHminimum≥ 6.5 SUall year
pHmaximum≤ 8.5 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendeddaily maximum≤ 50 mg/Lall year
Solids, total suspendedmonthly average≤ 948 lb/dall year
Solids, total suspendeddaily maximum≤ 1580 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedweekly averagereport only (mg/L)all year
Solids, total suspendeddaily maximumreport only (mg/L)all year
Solids, total suspendedmonthly averagereport only (lb/d)all year
Solids, total suspendeddaily maximumreport only (lb/d)all year
Solids, settleableweekly averagereport only (mL/L)all year
Solids, settleabledaily maximumreport only (mL/L)all year
Oil & Greasedaily maximumreport only (mg/L)all year
Nitrogen, total [as N]monthly averagereport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec
Nitrogen, total [as N]monthly averagereport only (mg/L)May–Oct
Nitrogen, total [as N]daily maximumreport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec
Nitrogen, total [as N]daily maximumreport only (mg/L)May–Oct
Nitrogen, total [as N]monthly averagereport only (lb/d)Jan, Feb, Mar, Apr, Nov, Dec
Nitrogen, total [as N]monthly averagereport only (lb/d)May–Oct
Nitrogen, ammonia total [as N]monthly averagereport only (ug/L)all year
Nitrogen, ammonia total [as N]daily maximumreport only (ug/L)all year
Nitrogen, nitrite total [as N]monthly averagereport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec
Nitrogen, nitrite total [as N]monthly averagereport only (mg/L)May–Oct
Nitrogen, nitrite total [as N]daily maximumreport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec
Nitrogen, nitrite total [as N]daily maximumreport only (mg/L)May–Oct
Nitrogen, nitrate total [as N]monthly averagereport only (mg/L)May–Oct
Nitrogen, nitrate total [as N]monthly averagereport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec
Nitrogen, nitrate total [as N]daily maximumreport only (mg/L)May–Oct
Nitrogen, nitrate total [as N]daily maximumreport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)May–Oct
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)May–Oct
Cadmium, total [as Cd]monthly averagereport only (ug/L)all year
Cadmium, total [as Cd]daily maximumreport only (ug/L)all year
Chromium, hexavalent [as Cr]monthly averagereport only (ug/L)all year
Chromium, hexavalent [as Cr]daily maximumreport only (ug/L)all year
Copper, total [as Cu]monthly averagereport only (ug/L)all year
Copper, total [as Cu]daily maximumreport only (ug/L)all year
Lead, total [as Pb]monthly averagereport only (ug/L)all year
Lead, total [as Pb]daily maximumreport only (ug/L)all year
Nickel, total [as Ni]monthly averagereport only (ug/L)all year
Nickel, total [as Ni]daily maximumreport only (ug/L)all year
Zinc, total [as Zn]monthly averagereport only (ug/L)all year
Zinc, total [as Zn]daily maximumreport only (ug/L)all year
Aluminum, total [as Al]monthly averagereport only (ug/L)all year
Aluminum, total [as Al]daily maximumreport only (ug/L)all year
Flow, in conduit or thru treatment plantmonthly average≤ 3.79 MGDall year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualmonthly average≤ 364 ug/Lall year
Chlorine, total residualdaily maximum≤ 364 ug/Lall year
Cyanide, free availablemonthly averagereport only (ug/L)all year
Cyanide, free availabledaily maximumreport only (ug/L)all year
Perfluorooctanoic acid (PFOA)daily maximumreport only (ng/L)all year
Perfluorooctanoic acid (PFOA)daily maximumreport only (ng/L)all year
Perfluorobutanoic acid (PFBA)daily maximumreport only (ng/L)all year
Perfluorobutanoic acid (PFBA)daily maximumreport only (ng/L)all year
Perfluorooctanesulfonamide (PFOSA)daily maximumreport only (ng/L)all year
Perfluorooctanesulfonamide (PFOSA)daily maximumreport only (ng/L)all year
Perfluoropentanoic acid (PFPeA)daily maximumreport only (ng/L)all year
Perfluoropentanoic acid (PFPeA)daily maximumreport only (ng/L)all year
Perfluorohexanoic acid (PFHxA)daily maximumreport only (ng/L)all year
Perfluorohexanoic acid (PFHxA)daily maximumreport only (ng/L)all year
Perfluoroheptanoic acid (PFHpA)daily maximumreport only (ng/L)all year
Perfluoroheptanoic acid (PFHpA)daily maximumreport only (ng/L)all year
Perfluorononanoic acid (PFNA)daily maximumreport only (ng/L)all year
Perfluorononanoic acid (PFNA)daily maximumreport only (ng/L)all year
Perfluorodecanoic acid (PFDA)daily maximumreport only (ng/L)all year
Perfluorodecanoic acid (PFDA)daily maximumreport only (ng/L)all year
Perfluoroundecanoic acid (PFUnA)daily maximumreport only (ng/L)all year
Perfluoroundecanoic acid (PFUnA)daily maximumreport only (ng/L)all year
Perfluorododecanoic acid (PFDoA)daily maximumreport only (ng/L)all year
Perfluorododecanoic acid (PFDoA)daily maximumreport only (ng/L)all year
Perfluorotridecanoic acid (PFTrDA)daily maximumreport only (ng/L)all year
Perfluorotridecanoic acid (PFTrDA)daily maximumreport only (ng/L)all year
Perfluorotetradecanoic acid (PFTeDA)daily maximumreport only (ng/L)all year
Perfluorotetradecanoic acid (PFTeDA)daily maximumreport only (ng/L)all year
N-ethyl perfluorooctanesulfonamidoethanol (NEtFOSE)daily maximumreport only (ng/L)all year
N-ethyl perfluorooctanesulfonamidoethanol (NEtFOSE)daily maximumreport only (ng/L)all year
N-methyl perfluorooctanesulfonamidoethanol (NMeFOSE)daily maximumreport only (ng/L)all year
N-methyl perfluorooctanesulfonamidoethanol (NMeFOSE)daily maximumreport only (ng/L)all year
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)daily maximumreport only (ng/L)all year
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)daily maximumreport only (ng/L)all year
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)daily maximumreport only (ng/L)all year
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)daily maximumreport only (ng/L)all year
Perfluorobutanesulfonic acid (PFBS)daily maximumreport only (ng/L)all year
Perfluorobutanesulfonic acid (PFBS)daily maximumreport only (ng/L)all year
Perfluorodecanesulfonic acid (PFDS)daily maximumreport only (ng/L)all year
Perfluorodecanesulfonic acid (PFDS)daily maximumreport only (ng/L)all year
Perfluoroheptanesulfonic acid (PFHpS)daily maximumreport only (ng/L)all year
Perfluoroheptanesulfonic acid (PFHpS)daily maximumreport only (ng/L)all year
Perfluorohexanesulfonic acid (PFHxS)daily maximumreport only (ng/L)all year
Perfluorohexanesulfonic acid (PFHxS)daily maximumreport only (ng/L)all year
Perfluorooctanesulfonic acid (PFOS)daily maximumreport only (ng/L)all year
Perfluorooctanesulfonic acid (PFOS)daily maximumreport only (ng/L)all year
1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS)daily maximumreport only (ng/L)all year
1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS)daily maximumreport only (ng/L)all year
1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS)daily maximumreport only (ng/L)all year
1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS)daily maximumreport only (ng/L)all year
1H,1H, 2H, 2H-Perfluorodecane sulfonic acid (8:2 FTS)daily maximumreport only (ng/L)all year
1H,1H, 2H, 2H-Perfluorodecane sulfonic acid (8:2 FTS)daily maximumreport only (ng/L)all year
Perfluoropentanesulfonic acid (PFPeS)daily maximumreport only (ng/L)all year
Perfluoropentanesulfonic acid (PFPeS)daily maximumreport only (ng/L)all year
Perfluorononanesulfonic acid (PFNS)daily maximumreport only (ng/L)all year
Perfluorononanesulfonic acid (PFNS)daily maximumreport only (ng/L)all year
Hexafluoropropylene oxide dimer acid (HFPO-DA)daily maximumreport only (ng/L)all year
Hexafluoropropylene oxide dimer acid (HFPO-DA)daily maximumreport only (ng/L)all year
Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)daily maximumreport only (ng/L)all year
Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)daily maximumreport only (ng/L)all year
Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA)daily maximumreport only (ng/L)all year
Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA)daily maximumreport only (ng/L)all year
Perfluorododecanesulfonic acid (PFDoS)daily maximumreport only (ng/L)all year
Perfluorododecanesulfonic acid (PFDoS)daily maximumreport only (ng/L)all year
4,8-Dioxa-3H-perfluorononanoic acid (ADONA)daily maximumreport only (ng/L)all year
4,8-Dioxa-3H-perfluorononanoic acid (ADONA)daily maximumreport only (ng/L)all year
N-methyl perfluorooctanesulfonamide (NMeFOSA)daily maximumreport only (ng/L)all year
N-methyl perfluorooctanesulfonamide (NMeFOSA)daily maximumreport only (ng/L)all year
N-ethyl perfluorooctanesulfonamide (NEtFOSA)daily maximumreport only (ng/L)all year
N-ethyl perfluorooctanesulfonamide (NEtFOSA)daily maximumreport only (ng/L)all year
Enterococcimonthly geometric mean≤ 35 CFU/100mLall year
Enterococcidaily maximum≤ 276 CFU/100mLall year
Coliform, fecal generalmonthly geometric meanreport only (MPN/100mL)all year
Coliform, fecal generaldaily maximumreport only (MPN/100mL)all year
BOD, 5-day, percent removalminimum≥ 85 %all year
Solids, suspended percent removalminimum≥ 85 %all year
3-Perfluoropropyl propanoic acid (3:3 FTCA)daily maximumreport only (ng/L)all year
3-Perfluoropropyl propanoic acid (3:3 FTCA)daily maximumreport only (ng/L)all year
Perfluoro-3-methoxypropanoic acid (PFMPA)daily maximumreport only (ng/L)all year
Perfluoro-3-methoxypropanoic acid (PFMPA)daily maximumreport only (ng/L)all year
9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS)daily maximumreport only (ng/L)all year
9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS)daily maximumreport only (ng/L)all year
11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)daily maximumreport only (ng/L)all year
11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)daily maximumreport only (ng/L)all year
3-Perfluoroheptyl propanoic acid (7:3 FTCA)daily maximumreport only (ng/L)all year
3-Perfluoroheptyl propanoic acid (7:3 FTCA)daily maximumreport only (ng/L)all year
Perfluoro-4-methoxybutanoic acid (PFMBA)daily maximumreport only (ng/L)all year
Perfluoro-4-methoxybutanoic acid (PFMBA)daily maximumreport only (ng/L)all year
2H,2H,3H,3H-Perfluorooctanoic acid (5:3 FTCA)daily maximumreport only (ng/L)all year
2H,2H,3H,3H-Perfluorooctanoic acid (5:3 FTCA)daily maximumreport only (ng/L)all year
LC50 Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia)minimum≥ 100 %all year

How strict are these limits?

Cited limits by parameter: Rhode Island's rules and the federal ones.

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/RI0100005 · MCP: https://passage-data.com/mcp