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Sewerage Systems, Topeka, Kansas. NPDES permit KS0119911, in force until Apr 30, 2030. Last 12 months: over a limit 6 times (last June 2026), 16 required values missing, 6 of 20 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| December 2025 | E. coli, monthly geometric mean | 12997 #/100mL | ≤ 3843 #/100mL | 238% |
| March 2026 | Solids, total suspended, monthly average | 50.7 mg/L | ≤ 30 mg/L | 69% |
| March 2026 | Solids, total suspended, maximum weekly average | 50.7 mg/L | ≤ 45 mg/L | 13% |
| May 2026 | E. coli, monthly geometric mean | 11199 #/100mL | ≤ 427 #/100mL | 2523% |
| May 2026 | Solids, total suspended, monthly average | 32 mg/L | ≤ 30 mg/L | 7% |
| June 2026 | E. coli, monthly geometric mean | 24196 #/100mL | ≤ 427 #/100mL | 5567% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 45 mg/L | all year | 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, ammonia total [as N] | monthly average | report only (mg/L) | Jan | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 20.5 mg/L | Jun | 001 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | Feb | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 34.6 mg/L | May | 001 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | Mar | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 38 mg/L | Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 16.8 mg/L | Jul | 001 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | Apr | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 18.4 mg/L | Aug | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 24.8 mg/L | Sep | 001 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | Nov | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Jan | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 20.5 mg/L | Jun | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Feb | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 34.6 mg/L | May | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Mar | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 38 mg/L | Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 16.8 mg/L | Jul | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Apr | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 18.4 mg/L | Aug | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 24.8 mg/L | Sep | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Nov | 001 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Chlorine, total residual | minimum weekly average | ≥ .2 mg/L | all year | 001 |
| E. coli | monthly geometric mean | ≤ 427 #/100mL | Jul | 001 |
| E. coli | monthly geometric mean | ≤ 3843 #/100mL | Jan | 001 |
| E. coli | monthly geometric mean | ≤ 427 #/100mL | Sep | 001 |
| E. coli | monthly geometric mean | ≤ 427 #/100mL | Apr | 001 |
| E. coli | monthly geometric mean | ≤ 427 #/100mL | Jun | 001 |
| E. coli | monthly geometric mean | ≤ 427 #/100mL | May | 001 |
| E. coli | monthly geometric mean | ≤ 3843 #/100mL | Dec | 001 |
| E. coli | monthly geometric mean | ≤ 427 #/100mL | Oct | 001 |
| E. coli | monthly geometric mean | ≤ 3843 #/100mL | Nov | 001 |
| E. coli | monthly geometric mean | ≤ 427 #/100mL | Aug | 001 |
| E. coli | monthly geometric mean | ≤ 3843 #/100mL | Mar | 001 |
| E. coli | monthly geometric mean | ≤ 3843 #/100mL | Feb | 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 |
Cited limits by parameter: Kansas's rules and the federal ones.
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