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American Samoa Power Authority Tafuna Sewage Treatment Plant

Sewage treatment plant, major discharger, Pago Pago, American Samoa. NPDES permit AS0020010 expired Nov 1, 2004; its limits still apply. Last 12 months: over a limit once (last March 2026), 1 of 21 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A quarterly (16 values), outfall 001 form Q quarterly (6 values), outfall INF form A quarterly (8 values)
Last report on file
June 2026
Oct 2024 – Sep 2025
1 value over a limit, 2 required values missing, 14 of 28 reports late

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

Period endingParameterReportedLimitOver by
March 2026Solids, total suspended, highest weekly average115 mg/L≤ 113 mg/L2%

Limits in force (30)

ParameterStatisticLimitMonthsOutfall
BOD, 5-day, 20 deg. Cmonthly average≤ 100 mg/Lall year001
BOD, 5-day, 20 deg. Chighest weekly average≤ 150 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 1669 lb/dall year001
BOD, 5-day, 20 deg. Chighest weekly average≤ 2504 lb/dall year001
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 8.6 SUall year001
Solids, total suspendedmonthly average≤ 75 mg/Lall year001
Solids, total suspendedhighest weekly average≤ 113 mg/Lall year001
Solids, total suspendedmonthly average≤ 1252 lb/dall year001
Solids, total suspendedhighest weekly average≤ 1878 lb/dall year001
Solids, settleablemonthly average≤ 1 mL/Lall year001
Solids, settleabledaily maximum≤ 2 mL/Lall year001
Oil and greasemonthly averagereport only (mg/L)all year001
Oil and greasedaily maximumreport only (mg/L)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
BOD, 5-day, percent removalmonthly average minimum≥ 30 %all year001
Solids, suspended percent removalmonthly average minimum≥ 30 %all year001
TU Static 20Min Chronic Strongyl. purpuratusmonthly averagereport only (tox chronic)all year001
TU Static 20Min Chronic Strongyl. purpuratusdaily maximumreport only (tox chronic)all year001
Static 20Min Chronic Dendraster excentricusmonthly averagereport only (tox chronic)all year001
Static 20Min Chronic Dendraster excentricusdaily maximumreport only (tox chronic)all year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all yearINF
BOD, 5-day, 20 deg. Chighest weekly averagereport only (mg/L)all yearINF
BOD, 5-day, 20 deg. Cmonthly averagereport only (lb/d)all yearINF
BOD, 5-day, 20 deg. Chighest weekly averagereport only (lb/d)all yearINF
Solids, total suspendedmonthly averagereport only (mg/L)all yearINF
Solids, total suspendedhighest weekly averagereport only (mg/L)all yearINF
Solids, total suspendedmonthly averagereport only (lb/d)all yearINF
Solids, total suspendedhighest weekly averagereport only (lb/d)all yearINF

How strict are these limits?

Cited limits by parameter: we hold no rule of American Samoa's own; 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/AS0020010 · MCP: https://passage-data.com/mcp