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Paris Utility District

Sewage treatment plant, major discharger, South Paris, Maine. NPDES permit ME0100951 expired Mar 31, 2025; its limits still apply. Last 12 months: no values over a limit, 16 required values missing, 2 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (41 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 1 required value missing, 2 of 12 reports late

Limits in force (55)

ParameterStatisticLimitMonths
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LJun–Aug
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LJan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec
BOD, 5-day, 20 deg. Cdaily maximum≤ 50 mg/LJun–Aug
BOD, 5-day, 20 deg. Cdaily maximum≤ 50 mg/LJan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly average≤ 113 lb/dJun–Aug
BOD, 5-day, 20 deg. Cmonthly average≤ 163 lb/dJan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec
BOD, 5-day, 20 deg. Cdaily maximum≤ 188 lb/dJun–Aug
BOD, 5-day, 20 deg. Cdaily maximum≤ 271 lb/dJan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/LJan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/LJun–Aug
BOD, 5-day, 20 deg. Cweekly average≤ 244 lb/dJan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec
BOD, 5-day, 20 deg. Cweekly average≤ 169 lb/dJun–Aug
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/LJun–Aug
Solids, total suspendedmonthly average≤ 30 mg/LJan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec
Solids, total suspendeddaily maximum≤ 50 mg/LJun–Aug
Solids, total suspendeddaily maximum≤ 50 mg/LJan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec
Solids, total suspendedmonthly average≤ 113 lb/dJun–Aug
Solids, total suspendedmonthly average≤ 163 lb/dJan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec
Solids, total suspendeddaily maximum≤ 188 lb/dJun–Aug
Solids, total suspendeddaily maximum≤ 271 lb/dJan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec
Solids, total suspendedweekly average≤ 45 mg/LJun–Aug
Solids, total suspendedweekly average≤ 45 mg/LJan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec
Solids, total suspendedweekly average≤ 169 lb/dJun–Aug
Solids, total suspendedweekly average≤ 244 lb/dJan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec
Solids, settleabledaily maximum≤ .3 mL/Lall year
Cadmium, total [as Cd]monthly averagereport only (ug/L)Mar, Jun, Sep, Dec
Cadmium, total [as Cd]monthly average≤ .0026 lb/dMar, Jun, Sep, Dec
Copper, total [as Cu]monthly averagereport only (ug/L)Mar, Jun, Sep, Dec
Copper, total [as Cu]daily maximumreport only (ug/L)Mar, Jun, Sep, Dec
Copper, total [as Cu]monthly average≤ .17 lb/dMar, Jun, Sep, Dec
Copper, total [as Cu]daily maximum≤ .22 lb/dMar, Jun, Sep, Dec
Lead, total [as Pb]monthly averagereport only (ug/L)Mar, Jun, Sep, Dec
Lead, total [as Pb]monthly average≤ .01 lb/dMar, Jun, Sep, Dec
Silver, total [as Ag]monthly averagereport only (ug/L)Mar, Jun, Sep, Dec
Silver, total [as Ag]monthly average≤ .0047 lb/dMar, Jun, Sep, Dec
Zinc, total [as Zn]monthly averagereport only (ug/L)Mar, Jun, Sep, Dec
Zinc, total [as Zn]daily maximumreport only (ug/L)Mar, Jun, Sep, Dec
Zinc, total [as Zn]monthly average≤ .76 lb/dMar, Jun, Sep, Dec
Zinc, total [as Zn]daily maximum≤ .61 lb/dMar, Jun, Sep, Dec
E. coli, thermotol, MF, MTECmonthly geometric mean≤ 126 #/100mLApr–Oct
E. coli, thermotol, MF, MTECdaily maximum≤ 949 #/100mLApr–Oct
Flow, in conduit or thru treatment plantmonthly average≤ .65 MGDall year
Chlorine, total residualmonthly average≤ .06 mg/LApr–Oct
Chlorine, total residualdaily maximum≤ .08 mg/LApr–Oct
Analytical Chemistryvaluereport only (N=0;Y=1)all year
Analytical Chemistryvaluereport only (N=0;Y=1)all year
Mercury, total [as Hg]monthly average≤ 16.5 ng/Lall year
Mercury, total [as Hg]daily maximum≤ 24.8 ng/Lall year
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 minimum≥ 20 %all year
NOEL Static Renewal 7Day Chronic Ceriodaphnia dubiadaily minimum≥ 20 %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/ME0100951 · MCP: https://passage-data.com/mcp