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Sewage treatment plant, major discharger, Pago Pago, American Samoa. NPDES permit AS0020001 expired Dec 31, 2024; its limits still apply. Last 12 months: over a limit 5 times (last June 2026), 1 of 19 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| December 2025 | Nitrogen, total [as N], monthly average | 31000 ug/L | ≤ 24200 ug/L | 28% |
| January 2026 | BOD, 5-day, 20 deg. C, monthly average | 1979 lb/d | ≤ 1960 lb/d | 1% |
| March 2026 | Enterococci, monthly average | 4133 CFU/100mL | ≤ 3185 CFU/100mL | 30% |
| March 2026 | Nitrogen, total [as N], monthly average | 34000 ug/L | ≤ 24200 ug/L | 40% |
| June 2026 | Oil and grease, monthly average | 11.9 mg/L | ≤ 10 mg/L | 19% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. centigrade | monthly average | report only (deg C) | all year | 001 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 78.3 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | highest weekly average | ≤ 117 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 157 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 1960 lb/d | all year | 001 |
| BOD, 5-day, 20 deg. C | highest weekly average | ≤ 2929 lb/d | all year | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 3930 lb/d | all year | 001 |
| pH | minimum | ≥ 6.5 SU | all year | 001 |
| pH | maximum | ≤ 8.6 SU | all year | 001 |
| Solids, total suspended | monthly average | ≤ 75 mg/L | all year | 001 |
| Solids, total suspended | highest weekly average | ≤ 113 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 150 mg/L | all year | 001 |
| Solids, total suspended | monthly average | ≤ 1878 lb/d | all year | 001 |
| Solids, total suspended | highest weekly average | ≤ 2829 lb/d | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 3755 lb/d | all year | 001 |
| Solids, settleable | monthly average | ≤ 1 mL/L | all year | 001 |
| Solids, settleable | daily maximum | ≤ 2 mL/L | all year | 001 |
| Nitrogen, total [as N] | monthly average | report only (ug/L) | all year | 001 |
| Nitrogen, total [as N] | monthly average | ≤ 24200 ug/L | all year | 001 |
| Nitrogen, total [as N] | daily maximum | report only (ug/L) | all year | 001 |
| Nitrogen, total [as N] | daily maximum | ≤ 60500 ug/L | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1 Ratio | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 1 Ratio | all year | 001 |
| Oil and grease | monthly average | ≤ 10 mg/L | all year | 001 |
| Oil and grease | daily maximum | ≤ 15 mg/L | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | highest weekly average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Phosphorus, Total | monthly average | report only (ug/L) | all year | 001 |
| Phosphorus, Total | monthly average | ≤ 3630 ug/L | all year | 001 |
| Phosphorus, Total | daily maximum | report only (ug/L) | all year | 001 |
| Phosphorus, Total | daily maximum | ≤ 10890 ug/L | all year | 001 |
| Enterococci | monthly average | ≤ 3185 CFU/100mL | all year | 001 |
| Enterococci | daily maximum | ≤ 11830 CFU/100mL | all year | 001 |
| BOD, 5-day, percent removal | monthly average minimum | ≥ 30 % | all year | 001 |
| Solids, suspended percent removal | monthly average minimum | ≥ 30 % | all year | 001 |
| Chronic Mthd Fertilization Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, Static40min S purpuratus | daily maximum | ≤ 0 pass=0;fail=1 | all year | 001 |
| Chronic Mthd Fertilization Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, Static40min S purpuratus | daily maximum | report only (% effect) | all year | 001 |
| Chronic Mthd Fertilization Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, Static40min D excentricus | daily maximum | ≤ 0 pass=0;fail=1 | all year | 001 |
| Chronic Mthd Fertilization Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, Static40min D excentricus | daily maximum | report only (% effect) | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | INF |
| BOD, 5-day, 20 deg. C | highest weekly average | report only (mg/L) | all year | INF |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | INF |
| BOD, 5-day, 20 deg. C | monthly average | report only (lb/d) | all year | INF |
| BOD, 5-day, 20 deg. C | highest weekly average | report only (lb/d) | all year | INF |
| BOD, 5-day, 20 deg. C | daily maximum | report only (lb/d) | all year | INF |
| Solids, total suspended | monthly average | report only (mg/L) | all year | INF |
| Solids, total suspended | highest weekly average | report only (mg/L) | all year | INF |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | INF |
| Solids, total suspended | monthly average | report only (lb/d) | all year | INF |
| Solids, total suspended | highest weekly average | report only (lb/d) | all year | INF |
| Solids, total suspended | daily maximum | report only (lb/d) | all year | INF |
Cited limits by parameter: we hold no rule of American Samoa's own; the federal ones.
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On EPA ECHO: Facility report · DMR history
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