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Bristol WWTP

Sewage treatment plant, Bristol, Indiana. NPDES permit IN0036846, in force until Jan 31, 2029. Last 12 months: over a limit 9 times (last March 2026), 4 required values missing, 3 of 20 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (21 values), form AQ quarterly (6 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
3 values over a limit, 2 required values missing, 6 of 22 reports late

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

Period endingParameterReportedLimitOver by
October 2025BOD, carbonaceous [5 day, 20 C], monthly average28.8 mg/L≤ 25 mg/L15%
October 2025BOD, carbonaceous [5 day, 20 C], maximum weekly average59.04 mg/L≤ 40 mg/L48%
October 2025Nitrogen, ammonia total [as N], daily maximum24.7 mg/L≤ 20.2 mg/L22%
October 2025Solids, total suspended, monthly average30.5 mg/L≤ 30 mg/L2%
January 2026Nitrogen, ammonia total [as N], monthly average11.64 mg/L≤ 9.1 mg/L28%
February 2026Nitrogen, ammonia total [as N], daily maximum28.5 mg/L≤ 21.2 mg/L34%
February 2026Nitrogen, ammonia total [as N], monthly average13.73 mg/L≤ 9.1 mg/L51%
March 2026Nitrogen, ammonia total [as N], daily maximum32.9 mg/L≤ 21.2 mg/L55%
March 2026Nitrogen, ammonia total [as N], monthly average14.03 mg/L≤ 9.1 mg/L54%

Limits in force (73)

ParameterStatisticLimitMonthsOutfall
pHdaily minimum≥ 6 SUall year001
pHdaily maximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall year001
Solids, total suspendedmonthly average≤ 188 lb/dall year001
Solids, total suspendedmaximum weekly average≤ 282 lb/dall year001
Nitrogen, ammonia total [as N]monthly average≤ 8.7 mg/LMay–Nov001
Nitrogen, ammonia total [as N]monthly average≤ 9.1 mg/LJan, Feb, Mar, Apr, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 20.2 mg/LMay–Nov001
Nitrogen, ammonia total [as N]daily maximum≤ 21.2 mg/LJan, Feb, Mar, Apr, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 54 lb/dMay–Nov001
Nitrogen, ammonia total [as N]monthly average≤ 57 lb/dJan, Feb, Mar, Apr, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 126 lb/dMay–Nov001
Nitrogen, ammonia total [as N]daily maximum≤ 132 lb/dJan, Feb, Mar, Apr, Dec001
Phosphorus, total [as P]monthly average≤ 1 mg/Lall year001
Phosphorus, total [as P]monthly averagereport only (lb/d)all year001
Zinc, total recoverabledaily maximumreport only (mg/L)Mar, Jun, Sep, Dec001
Zinc, total recoverabledaily maximumreport only (mg/L)Mar, Jun, Sep, Dec001
Zinc, total recoverabledaily maximumreport only (lb/d)Mar, Jun, Sep, Dec001
Zinc, total recoverabledaily maximumreport only (lb/d)Mar, Jun, Sep, Dec001
Zinc, total recoverabledaily maximumreport only (mg/L)Mar, Jun, Sep, Dec001
Zinc, total recoverabledaily maximumreport only (mg/L)Mar, Jun, Sep, Dec001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
E. coli, colony forming units [CFU]monthly geometric mean≤ 125 CFU/100mLApr–Oct001
E. coli, colony forming units [CFU]daily maximum≤ 235 CFU/100mLApr–Oct001
Toxicity [acute], Ceriodaphnia dubiamaximum≤ 1 tox acuteFeb001
Toxicity [acute], Ceriodaphnia dubiamaximum≤ 1 tox acuteFeb001
Toxicity [acute], Ceriodaphnia dubiamaximum≤ 1 tox acuteFeb001
Toxicity [acute], Ceriodaphnia dubiadaily maximum≤ 1 tox acuteMay, Nov001
Toxicity [acute], Ceriodaphnia dubiadaily maximum≤ 1 tox acuteMay, Nov001
Toxicity [acute], Ceriodaphnia dubiadaily maximum≤ 1 tox acuteMay, Nov001
Toxicity [acute], Ceriodaphnia dubiamaximum≤ 1 tox acuteApr, Oct001
Toxicity [acute], Pimephales promelas [Fathead Minnow]maximum≤ 1 tox acuteFeb001
Toxicity [acute], Pimephales promelas [Fathead Minnow]maximum≤ 1 tox acuteFeb001
Toxicity [acute], Pimephales promelas [Fathead Minnow]maximum≤ 1 tox acuteFeb001
Toxicity [acute], Pimephales promelas [Fathead Minnow]daily maximum≤ 1 tox acuteMay, Nov001
Toxicity [acute], Pimephales promelas [Fathead Minnow]daily maximum≤ 1 tox acuteMay, Nov001
Toxicity [acute], Pimephales promelas [Fathead Minnow]daily maximum≤ 1 tox acuteMay, Nov001
Toxicity [acute], Pimephales promelas [Fathead Minnow]maximum≤ 1 tox acuteApr, Oct001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 40 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 156 lb/dall year001
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 250 lb/dall year001
Phosphorus, total percent removalmonthly average minimum≥ 75 %all year001
Flow, totalmonthly totalreport only (Mgal/mo)all year001
TU Static 48Hr Acute Daphnia magnamaximum≤ 1 tox acuteFeb001
TU Static 48Hr Acute Daphnia magnamaximum≤ 1 tox acuteFeb001
TU Static 48Hr Acute Daphnia magnamaximum≤ 1 tox acuteFeb001
TU Static 48Hr Acute Daphnia magnadaily maximum≤ 1 tox acuteMay, Nov001
TU Static 48Hr Acute Daphnia magnadaily maximum≤ 1 tox acuteMay, Nov001
TU Static 48Hr Acute Daphnia magnadaily maximum≤ 1 tox acuteMay, Nov001
TU Static 48Hr Acute Daphnia magnamaximum≤ 1 tox acuteApr, Oct001
TU Static 48Hr Acute Daphnia pulexmaximum≤ 1 tox acuteFeb001
TU Static 48Hr Acute Daphnia pulexmaximum≤ 1 tox acuteFeb001
TU Static 48Hr Acute Daphnia pulexmaximum≤ 1 tox acuteFeb001
TU Static 48Hr Acute Daphnia pulexdaily maximum≤ 1 tox acuteMay, Nov001
TU Static 48Hr Acute Daphnia pulexdaily maximum≤ 1 tox acuteMay, Nov001
TU Static 48Hr Acute Daphnia pulexdaily maximum≤ 1 tox acuteMay, Nov001
TU Static 48Hr Acute Daphnia pulexmaximum≤ 1 tox acuteApr, Oct001
Copper, dry weightvaluereport only (mg/kg)Jun, DecPRT
Copper, dry weightvaluereport only (mg/kg)Jun, DecPRT
Cadmium, dry weightvaluereport only (mg/kg)Jun, DecPRT
Cadmium, dry weightvaluereport only (mg/kg)Jun, DecPRT
Molybdenum, sludge, total, dry weight [as Mo]valuereport only (mg/kg)Jun, DecPRT
Molybdenum, sludge, total, dry weight [as Mo]valuereport only (mg/kg)Jun, DecPRT
Zinc, sludge, total, dry weight [as Zn]valuereport only (mg/kg)Jun, DecPRT
Zinc, sludge, total, dry weight [as Zn]valuereport only (mg/kg)Jun, DecPRT
Lead, sludge, total, dry weight [as Pb]valuereport only (mg/kg)Jun, DecPRT
Lead, sludge, total, dry weight [as Pb]valuereport only (mg/kg)Jun, DecPRT
Nickel, sludge, total, dry weight [as Ni]valuereport only (mg/kg)Jun, DecPRT
Nickel, sludge, total, dry weight [as Ni]valuereport only (mg/kg)Jun, DecPRT
Mercury, sludge, total, dry weight [as Hg]valuereport only (mg/kg)Jun, DecPRT
Mercury, sludge, total, dry weight [as Hg]valuereport only (mg/kg)Jun, DecPRT

How strict are these limits?

Cited limits by parameter: Indiana'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/IN0036846 · MCP: https://passage-data.com/mcp