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Houlton Water Company

Sewage treatment plant, major discharger, Houlton, Maine. NPDES permit ME0101290, in force until Jun 30, 2031. Last 12 months: over a limit 2 times (last May 2026), 1 of 24 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (30 values), form B monthly (5 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
4 values over a limit, 0 required values missing, 1 of 24 reports late

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

Period endingParameterReportedLimitOver by
April 2026Flow, in conduit or thru treatment plant, monthly average1.66 MGD≤ 1.5 MGD11%
May 2026Flow, in conduit or thru treatment plant, monthly average1.684 MGD≤ 1.5 MGD12%

Limits in force (35)

ParameterStatisticLimitMonths
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≤ 375 lb/dall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 626 lb/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 563 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≤ 375 lb/dall year
Solids, total suspendeddaily maximum≤ 626 lb/dall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendedweekly average≤ 563 lb/dall year
Solids, settleabledaily maximum≤ .3 mL/Lall year
Phosphorus, total [as P]monthly average≤ 250 ug/LJun–Sep
Phosphorus, total [as P]daily maximum≤ 500 ug/LJun–Sep
Phosphorus, total [as P]monthly averagereport only (lb/d)Jun–Sep
Phosphorus, total [as P]daily maximumreport only (lb/d)Jun–Sep
Phosphorus, total [as P]average≤ 1.25 lb/dJul–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≤ 1.5 MGDall year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualmonthly average≤ .1 mg/Lall year
Chlorine, total residualdaily maximum≤ .12 mg/Lall year
Analytical Chemistryvaluereport only (N=0;Y=1)all year
Mercury, total [as Hg]monthly average≤ 5 ng/Lall year
Mercury, total [as Hg]daily maximum≤ 7.4 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 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 Salvel. Salmoniddaily minimumreport only (%)all year

New limits from Jul 1, 2029

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Chlorine, total residual, daily maximum0.08 mg/Ltighter0.04 mg/L (5 values)0.5×
Chlorine, total residual, monthly average0.05 mg/Ltighter0.01 mg/L (5 values)0.2×
E. coli, thermotol, MF, MTEC, daily maximum236 #/100mL (Apr–Oct)tighter52 #/100mL (5 values)0.22×

How strict are these limits?

Cited limits by parameter: Maine'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/ME0101290 · MCP: https://passage-data.com/mcp