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Mars Hill Utility District

Sewage treatment plant, major discharger, Mars Hill, Maine. NPDES permit ME0101079 expired Dec 31, 2022; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (37 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 12 reports late

Limits in force (47)

ParameterStatisticLimitMonths
Streamflowminimumreport only (cfs)all year
Streamflowmonthly averagereport only (cfs)all year
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 50 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 250 lb/dall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 417 lb/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 375 lb/dall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendeddaily maximum≤ 50 mg/Lall year
Solids, total suspendedmonthly average≤ 250 lb/dall year
Solids, total suspendeddaily maximum≤ 417 lb/dall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendedweekly average≤ 375 lb/dall year
Solids, settleabledaily maximum≤ .3 mL/Lall year
Phosphorus, total [as P]monthly averagereport only (mg/L)Jun–Sep
Phosphorus, total [as P]monthly averagereport only (mg/L)Jun–Sep
Phosphorus, total [as P]daily maximumreport only (mg/L)Jun–Sep
Phosphorus, total [as P]daily maximumreport only (mg/L)Jun–Sep
Phosphorus, total [as P]monthly averagereport only (lb/d)Jun–Sep
E. coli, thermotol, MF, MTECmonthly geometric mean≤ 64 #/100mLMay–Sep
E. coli, thermotol, MF, MTECdaily maximum≤ 427 #/100mLMay–Sep
Flow, in conduit or thru treatment plantmonthly average≤ 1 MGDall year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Flow, in conduit or thru treatment plantweekly averagereport only (MGD)all year
Chlorine, total residualmonthly average≤ .83 mg/LJun–Sep
Chlorine, total residualmonthly average≤ .1 mg/LMay
Chlorine, total residualdaily maximum≤ 1 mg/LJun–Sep
Chlorine, total residualdaily maximum≤ .3 mg/LMay
Analytical Chemistryvaluereport only (N=0;Y=1)all year
Analytical Chemistryvaluereport only (N=0;Y=1)all year
Mercury, total [as Hg]monthly average≤ 6.1 ng/Lall year
Mercury, total [as Hg]daily maximum≤ 9.1 ng/Lall year
Dilution factorminimum≥ 50 RatioMar, Apr, May, Oct, Nov
Dilution factorminimum≥ 75 RatioJan, Feb, Jun, Jul, Aug, Sep, Dec
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year
Solids, suspended percent removalmonthly average minimum≥ 85 %all year
NOEL Static Renewal 7Day Chronic Ceriodaphnia dubiadaily minimumreport only (%)all year
NOEL Static Renewal 7Day Chronic Ceriodaphnia dubiadaily minimumreport only (%)all year
Noel Statre 10Day Chronic Salvel. Salmoniddaily minimumreport only (%)all year
Noel Statre 10Day Chronic Salvel. Salmoniddaily minimumreport only (%)all year
NOAEL Static 48Hr Acute Ceriodaphnia dubiadaily minimumreport only (%)all year
NOAEL Static 48Hr Acute Ceriodaphnia dubiadaily minimumreport only (%)all year
NOAEL Static 48Hr Acute Salvel. Salmoniddaily minimumreport only (%)all year
NOAEL Static 48Hr Acute Salvel. Salmoniddaily minimumreport only (%)all year

How strict are these limits?

Cited limits by parameter: Maine'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/ME0101079 · MCP: https://passage-data.com/mcp