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Sewage treatment plant, Hesston, Kansas. NPDES permit KS0022799, in force until May 31, 2027. Last 12 months: over a limit 7 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Outfall | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|---|
| February 2026 | 003 | Nitrogen, ammonia total [as N], daily maximum | 11.4 mg/L | ≤ 9.2 mg/L | 24% |
| February 2026 | 003 | Nitrogen, ammonia total [as N], monthly average | 11.4 mg/L | ≤ 2.6 mg/L | 338% |
| March 2026 | 003 | Nitrogen, ammonia total [as N], daily maximum | 10.8 mg/L | ≤ 9.2 mg/L | 17% |
| March 2026 | 003 | Nitrogen, ammonia total [as N], monthly average | 10.8 mg/L | ≤ 2.3 mg/L | 370% |
| June 2026 | 002 | E. coli, monthly geometric mean | 469.97506 #/100mL | ≤ 262 #/100mL | 79% |
| June 2026 | 003 | E. coli, monthly geometric mean | 469.97506 #/100mL | ≤ 262 #/100mL | 79% |
| August 2026 | 003 | Nitrogen, ammonia total [as N], monthly average | 1.05 mg/L | ≤ .9 mg/L | 17% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 001 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, Kjeldahl, 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 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 002 |
| E. coli | monthly geometric mean | ≤ 262 #/100mL | all year | 002 |
| Oxygen, dissolved [DO] | minimum weekly average | ≥ 6 mg/L | all year | 003 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 20 mg/L | Jun–Aug | 003 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 25 mg/L | Apr, May, Sep, Oct | 003 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | Jan, Feb, Mar, Nov, Dec | 003 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 30 mg/L | Jun–Aug | 003 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 40 mg/L | Apr, May, Sep, Oct | 003 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 45 mg/L | Jan, Feb, Mar, Nov, Dec | 003 |
| pH | daily minimum | ≥ 6 SU | all year | 003 |
| pH | daily maximum | ≤ 9 SU | all year | 003 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 003 |
| Solids, total suspended | maximum weekly average | ≤ 45 mg/L | all year | 003 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 003 |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | all year | 003 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.5 mg/L | Apr | 003 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2.3 mg/L | Mar | 003 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .9 mg/L | Aug | 003 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .8 mg/L | Jul | 003 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.1 mg/L | Sep | 003 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2.6 mg/L | Jan, Feb, Nov, Dec | 003 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.2 mg/L | May | 003 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .9 mg/L | Jun | 003 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.8 mg/L | Oct | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 6.1 mg/L | Apr | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 9.2 mg/L | Mar | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.1 mg/L | Aug | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.9 mg/L | Jul | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4.2 mg/L | Sep | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 9.2 mg/L | Jan, Feb, Nov, Dec | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4.5 mg/L | May | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.3 mg/L | Jun | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7.7 mg/L | Oct | 003 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year | 003 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | 003 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 003 |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | all year | 003 |
| Arsenic, total recoverable | monthly average | report only (ug/L) | all year | 003 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 003 |
| E. coli | monthly geometric mean | ≤ 262 #/100mL | Apr–Oct | 003 |
| E. coli | monthly geometric mean | ≤ 2358 #/100mL | Jan, Feb, Mar, Nov, Dec | 003 |
| E. coli | weekly geometric mean | ≤ 4348 #/100mL | Apr–Oct | 003 |
| E. coli | weekly geometric mean | report only (#/100mL) | Jan, Feb, Mar, Nov, Dec | 003 |
| Nitrogen, Total As N | daily average | report only (mg/L) | all year | 003 |
| Nitrogen, Total As N | EPA's "DPD AVG" | report only (lb/d) | all year | 003 |
| Phosphorus, Total As P | daily average | report only (mg/L) | all year | 003 |
| Phosphorus, Total As P | EPA's "DPD AVG" | ≤ 10.9 lb/d | all year | 003 |
Cited limits by parameter: Kansas's rules and the federal ones.
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On EPA ECHO: Facility report · DMR history
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