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Anchorage, Municipality of

Sewage treatment plant, major discharger, Anchorage, Alaska. NPDES permit AK0022551 expired Aug 2, 2005; 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 (29 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
2 values over a limit, 0 required values missing, 0 of 12 reports late

Limits in force (79)

ParameterStatisticLimitMonths
Temperature, water deg. centigradeinstantaneous maximumreport only (deg C)all year
Temperature, water deg. centigrademaximumreport only (deg C)all year
Temperature, water deg. centigradeinstantaneous maximumreport only (deg C)all year
Temperature, water deg. centigrademaximumreport only (deg C)all year
Oxygen, dissolved [DO]monthly minimumreport only (mg/L)all year
Oxygen, dissolved [DO]monthly minimumreport only (mg/L)all year
BOD, 5-day, 20 deg. C30-day average≤ 120 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 240 mg/Lall year
BOD, 5-day, 20 deg. C7-day average≤ 130 mg/Lall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 300 mg/Lall year
BOD, 5-day, 20 deg. C30-day average≤ 44060 lb/dall year
BOD, 5-day, 20 deg. Cmonthly average≤ 72100 lb/dall year
BOD, 5-day, 20 deg. C7-day average≤ 47730 lb/dall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 90100 lb/dall year
BOD, 5-day, 20 deg. C30-day averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. C30-day averagereport only (lb/d)all year
BOD, 5-day, 20 deg. Cmonthly averagereport only (lb/d)all year
BOD, 5-day, 20 deg. Cweekly average≤ 250 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 75100 lb/dall year
pHminimum≥ 6.5 SUall year
pHminimum≥ 6.5 SUall year
pHmaximum≤ 8.5 SUall year
pHmaximum≤ 8.5 SUall year
pHminimumreport only (SU)all year
pHminimumreport only (SU)all year
pHmaximumreport only (SU)all year
pHmaximumreport only (SU)all year
Solids, total suspended30-day average≤ 100 mg/Lall year
Solids, total suspendedmonthly average≤ 170 mg/Lall year
Solids, total suspended7-day average≤ 115 mg/Lall year
Solids, total suspendeddaily maximum≤ 190 mg/Lall year
Solids, total suspended30-day average≤ 36720 lb/dall year
Solids, total suspendedmonthly average≤ 51000 lb/dall year
Solids, total suspended7-day average≤ 42230 lb/dall year
Solids, total suspendeddaily maximum≤ 57000 lb/dall year
Solids, total suspended30-day averagereport only (mg/L)all year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspended30-day averagereport only (lb/d)all year
Solids, total suspendedmonthly averagereport only (lb/d)all year
Solids, total suspendedweekly average≤ 180 mg/Lall year
Solids, total suspendedweekly average≤ 54000 lb/dall year
Solids, settleable30-day averagereport only (mL/L)all year
Solids, settleable30-day averagereport only (mL/L)all year
Oil and grease [soxhlet extr.] tot.30-day averagereport only (mg/L)all year
Oil & Grease30-day averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year
Cyanide, total [as CN]30-day averagereport only (mg/L)all year
Cyanide, total [as CN]30-day averagereport only (mg/L)all year
Cyanide, free [amenable to chlorination]30-day averagereport only (mg/L)all year
Cyanide, free [amenable to chlorination]30-day averagereport only (mg/L)all year
Arsenic, total [as As]30-day averagereport only (mg/L)all year
Arsenic, total [as As]30-day averagereport only (mg/L)all year
Cadmium, total [as Cd]30-day averagereport only (mg/L)all year
Cadmium, total [as Cd]monthly averagereport only (mg/L)all year
Chromium, hexavalent [as Cr]30-day averagereport only (mg/L)all year
Chromium, hexavalent [as Cr]7-day averagereport only (mg/L)all year
Chromium, total [as Cr]30-day averagereport only (mg/L)all year
Chromium, total [as Cr]30-day averagereport only (mg/L)all year
Copper, total [as Cu]30-day averagereport only (mg/L)all year
Copper, total [as Cu]30-day averagereport only (mg/L)all year
Lead, total [as Pb]30-day averagereport only (mg/L)all year
Lead, total [as Pb]30-day averagereport only (mg/L)all year
Nickel, total [as Ni]30-day averagereport only (mg/L)all year
Nickel, total [as Ni]30-day averagereport only (mg/L)all year
Silver, total [as Ag]30-day averagereport only (mg/L)all year
Silver, total [as Ag]30-day averagereport only (mg/L)all year
Zinc, total [as Zn]30-day averagereport only (mg/L)all year
Zinc, total [as Zn]30-day averagereport only (mg/L)all year
Fecal coliform, MPN, EC med, 44.5 C30-day geometric mean≤ 850 MPN/100mLall year
Coliform, fecal MF, MFC broth, 44.5 C30-day geometric mean≤ 850 #/100mLall year
Flow, in conduit or thru treatment plant30-day average≤ 44 MGDall year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Chlorine, total residual30-day average≤ 1.2 mg/Lall year
Chlorine, total residualdaily maximum≤ 1.2 mg/Lall year
Mercury, total [as Hg]30-day averagereport only (mg/L)all year
Mercury, total [as Hg]30-day averagereport only (mg/L)all year
BOD, 5-day, percent removalminimum % removalreport only (%)all year
Solids, suspended percent removalminimum % removalreport only (%)all year

How strict are these limits?

Cited limits by parameter: Alaska'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/AK0022551 · MCP: https://passage-data.com/mcp