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Sewage treatment plant, Yates Center, Kansas. NPDES permit KS0097446, in force until Aug 31, 2028. Last 12 months: over a limit once (last December 2025). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| December 2025 | E. coli, monthly geometric mean | 13000 #/100mL | ≤ 3843 #/100mL | 238% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | monthly average | ≤ 20 mg/L | Aug | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 20 mg/L | Jun | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 20 mg/L | Apr | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 25 mg/L | Mar | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 20 mg/L | Sep | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 20 mg/L | Jul | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 25 mg/L | Feb | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 25 mg/L | Dec | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 20 mg/L | May | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 20 mg/L | Oct | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 20 mg/L | Nov | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 25 mg/L | Jan | 001 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 30 mg/L | Aug | 001 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 30 mg/L | Jun | 001 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 30 mg/L | Apr | 001 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 40 mg/L | Mar | 001 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 30 mg/L | Sep | 001 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 30 mg/L | Jul | 001 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 40 mg/L | Feb | 001 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 40 mg/L | Dec | 001 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 30 mg/L | May | 001 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 30 mg/L | Oct | 001 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 30 mg/L | Nov | 001 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 40 mg/L | Jan | 001 |
| pH | daily minimum | ≥ 6 SU | all year | 001 |
| pH | daily maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | maximum weekly average | ≤ 45 mg/L | all year | 001 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .6 mg/L | Aug | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2 mg/L | Feb | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2 mg/L | Jan | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .6 mg/L | Jul | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .7 mg/L | Sep | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.8 mg/L | Mar | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1 mg/L | May | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.7 mg/L | Nov | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2 mg/L | Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.4 mg/L | Apr | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .7 mg/L | Jun | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.2 mg/L | Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.6 mg/L | Aug | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.9 mg/L | Feb | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.9 mg/L | Jan | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.4 mg/L | Jul | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.2 mg/L | Sep | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.9 mg/L | Mar | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4.5 mg/L | May | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.9 mg/L | Nov | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.9 mg/L | Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7.1 mg/L | Apr | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.1 mg/L | Jun | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 5.7 mg/L | Oct | 001 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| E. coli | monthly geometric mean | ≤ 3843 #/100mL | all year | 001 |
| Nitrogen, Total As N | daily average | report only (mg/L) | all year | 001 |
| Nitrogen, Total As N | EPA's "DPD AVG" | report only (lb/d) | all year | 001 |
| Phosphorus, Total As P | daily average | report only (mg/L) | all year | 001 |
| Phosphorus, Total As P | EPA's "DPD AVG" | report only (lb/d) | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 002 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 002 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year | 002 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 002 |
Cited limits by parameter: Kansas's rules and the federal ones.
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