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Sewage treatment plant, Seward, Alaska. NPDES permit AK0021890, in force until Sep 30, 2027. Last 12 months: over a limit 3 times (last September 2026), 1 of 16 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| July 2026 | Nitrogen, ammonia total [as N], monthly average | 24.2 mg/L | ≤ 23 mg/L | 5% |
| August 2026 | Coliform, fecal general, monthly geometric mean | 32300 #/100mL | ≤ 25000 #/100mL | 29% |
| September 2026 | Coliform, fecal general, monthly geometric mean | 34000 #/100mL | ≤ 25000 #/100mL | 36% |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Temperature, water deg. centigrade | monthly average | report only (deg C) | all year |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year |
| Oxygen, dissolved [DO] | daily minimum | ≥ 6 mg/L | all year |
| Oxygen, dissolved [DO] | daily maximum | ≤ 17 mg/L | all year |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year |
| pH | instantaneous minimum | ≥ 6.5 SU | all year |
| pH | instantaneous maximum | ≤ 8.5 SU | all year |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year |
| Solids, total suspended | daily maximum | ≤ 60 mg/L | all year |
| Solids, total suspended | monthly average | ≤ 220 lb/d | all year |
| Solids, total suspended | daily maximum | ≤ 440 lb/d | all year |
| Solids, total suspended | monthly average | report only (mg/L) | all year |
| Solids, total suspended | daily maximum | report only (mg/L) | all year |
| Solids, total suspended | weekly average | ≤ 45 mg/L | all year |
| Solids, total suspended | weekly average | ≤ 330 lb/d | all year |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 23 mg/L | all year |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 47 mg/L | all year |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 168 lb/d | all year |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 345 lb/d | all year |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 35 mg/L | all year |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 228 lb/d | all year |
| Flow, in conduit or thru treatment plant | monthly average | ≤ .88 MGD | all year |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year |
| Phosphorus, Total | daily maximum | report only (ug/L) | all year |
| Enterococci | daily maximum | report only (#/100mL) | May–Sep |
| Coliform, fecal general | monthly geometric mean | ≤ 25000 #/100mL | all year |
| Coliform, fecal general | daily maximum | ≤ 50000 #/100mL | all year |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 25 mg/L | all year |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 55 mg/L | all year |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 183 lb/d | all year |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 404 lb/d | all year |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (mg/L) | all year |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | all year |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 40 mg/L | all year |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 294 lb/d | all year |
| BOD, carb-5 day, 20 deg C, percent removal | minimum | report only (%) | all year |
| Solids, suspended percent removal | minimum | ≥ 85 % | all year |
Cited limits by parameter: Alaska's rules and the federal ones.
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