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Portland Water District

Sewage treatment plant, Windham, Maine. NPDES permit MEU508276, in force until May 31, 2028. Last 12 months: over a limit 3 times (last September 2026), 80 required values missing, 19 of 26 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form A monthly (12 values), outfall 001 form B monthly (2 values), outfall GMW form 1 monthly (1 value), outfall GMW form 2 monthly (1 value), outfall GMW form 3 monthly (1 value)
Renewal application due
Dec 3, 2027 · 180 days before expiry; your permit may set another date
Last report on file
September 2026

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

Period endingParameterReportedLimitOver by
August 2026Nitrogen, nitrate total [as N], daily maximum16.3 mg/L≤ 10 mg/L63%
August 2026Phosphorus, total [as P], daily maximum7.9 mg/L≤ .1 mg/L7800%
September 2026Nitrogen, nitrate total [as N], daily maximum14.5 mg/L≤ 10 mg/L45%

Limits in force (36)

ParameterStatisticLimitMonthsOutfall
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year001
pHdaily maximumreport only (SU)all year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Nitrogen, nitrate total [as N]daily maximum≤ 10 mg/Lall year001
Phosphorus, total [as P]daily maximum≤ .1 mg/Lall year001
Arsenic, total [as As]daily maximumreport only (ug/L)all year001
Cadmium, total [as Cd]daily maximumreport only (ug/L)all year001
Chromium, total [as Cr]daily maximumreport only (ug/L)all year001
Copper, total [as Cu]daily maximumreport only (ug/L)all year001
Lead, total [as Pb]daily maximumreport only (ug/L)all year001
Nickel, total [as Ni]daily maximumreport only (ug/L)all year001
Zinc, total [as Zn]daily maximumreport only (ug/L)all year001
Application rate, gallons spray irrigationmonthly averagereport only (gal)all year001
Application rate, gallons spray irrigationdaily maximum≤ 432000 galall year001
Application rate, gallons spray irrigationannual average≤ 154000 galDec001
Temperature, water deg. centigradedaily maximumreport only (deg C)May, OctGMW
Temperature, water deg. centigradedaily maximumreport only (deg C)May, OctGMW
Temperature, water deg. centigradedaily maximumreport only (deg C)May, OctGMW
Specific conductancedaily maximumreport only (umho/cm)May, OctGMW
Specific conductancedaily maximumreport only (umho/cm)May, OctGMW
Specific conductancedaily maximumreport only (umho/cm)May, OctGMW
pHdaily maximumreport only (SU)May, OctGMW
pHdaily maximumreport only (SU)May, OctGMW
pHdaily maximumreport only (SU)May, OctGMW
Solids, total suspendeddaily maximumreport only (mg/L)May, OctGMW
Solids, total suspendeddaily maximumreport only (mg/L)May, OctGMW
Solids, total suspendeddaily maximumreport only (mg/L)May, OctGMW
Nitrogen, nitrate total [as N]daily maximumreport only (mg/L)May, OctGMW
Nitrogen, nitrate total [as N]daily maximumreport only (mg/L)May, OctGMW
Nitrogen, nitrate total [as N]daily maximumreport only (mg/L)May, OctGMW
Phosphorus, total [as P]daily maximumreport only (mg/L)May, OctGMW
Phosphorus, total [as P]daily maximumreport only (mg/L)May, OctGMW
Phosphorus, total [as P]daily maximumreport only (mg/L)May, OctGMW
Depth to water level ft below landsurfacedaily maximumreport only (ft)Mar, Jun, Sep, DecGMW
Depth to water level ft below landsurfacedaily maximumreport only (ft)Mar, Jun, Sep, DecGMW
Depth to water level ft below landsurfacedaily maximumreport only (ft)Mar, Jun, Sep, DecGMW

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/MEU508276 · MCP: https://passage-data.com/mcp