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Hannibal Board Pub Works

Water Supply, Hannibal, Missouri. NPDES permit MO0085391 expired Mar 31, 2022; its limits still apply. Last 12 months: no values over a limit, 4 required values missing, 2 of 20 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 002 form A monthly (10 values), outfall 002 form B quarterly (6 values), outfall 001 form A twice a year, outfall 001 form W yearly, outfall 002 form W yearly
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 4 of 20 reports late

Limits in force (28)

ParameterStatisticLimitMonthsOutfall
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 9 SUall year001
Solids, settleabledaily maximumreport only (mg/L)all year001
Solids, settleablemonthly averagereport only (mg/L)all year001
Copper, total recoverabledaily maximumreport only (ug/L)all year001
Copper, total recoverablemonthly averagereport only (ug/L)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Toxicity [acute], Ceriodaphnia dubiadaily maximumreport only (toxic)all year001
Toxicity [acute], Pimephales promelas [Fathead Minnow]daily maximumreport only (toxic)all year001
pHminimum≥ 6 SUall year002
pHmaximum≤ 9 SUall year002
Solids, settleabledaily maximumreport only (mL/L)all year002
Solids, settleablemonthly averagereport only (mL/L)all year002
Nitrogen, total [as N]daily maximumreport only (mg/L)all year002
Nitrogen, total [as N]monthly averagereport only (mg/L)all year002
Phosphorus, total [as P]daily maximumreport only (mg/L)all year002
Phosphorus, total [as P]monthly averagereport only (mg/L)all year002
Fluoridedaily maximum≤ 4 mg/Lall year002
Fluoridemonthly average≤ 2 mg/Lall year002
Copper, total recoverabledaily maximumreport only (ug/L)all year002
Copper, total recoverablemonthly averagereport only (ug/L)all year002
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year002
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year002
Chlorine, total residualdaily maximum≤ 496 ug/Lall year002
Chlorine, total residualmonthly average≤ 247 ug/Lall year002
Toxicity [acute], Ceriodaphnia dubiadaily maximumreport only (toxic)all year002
Toxicity [acute], Pimephales promelas [Fathead Minnow]daily maximumreport only (toxic)all year002

How strict are these limits?

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

Same industry: the 18 Water Supply permits in Missouri.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MO0085391 · MCP: https://passage-data.com/mcp