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Sewage treatment plant, major discharger, Larned, Kansas. NPDES permit KS0098752, in force until Jun 30, 2031. Last 12 months: over a limit 6 times (last June 2026), 1 required value missing. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| February 2026 | E. coli, monthly geometric mean | 2835.27776 #/100mL | ≤ 2358 #/100mL | 20% |
| March 2026 | E. coli, monthly geometric mean | 19900 #/100mL | ≤ 2358 #/100mL | 744% |
| March 2026 | Nitrogen, ammonia total [as N], monthly average | 3.7 mg/L | ≤ 2.4 mg/L | 54% |
| April 2026 | E. coli, monthly geometric mean | 414.04976 #/100mL | ≤ 262 #/100mL | 58% |
| June 2026 | Nitrogen, ammonia total [as N], daily maximum | 5.15 mg/L | ≤ 2.9 mg/L | 78% |
| June 2026 | Nitrogen, ammonia total [as N], monthly average | 5.15 mg/L | ≤ .9 mg/L | 472% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Conductivity | monthly average | report only (umho/cm) | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | Dec | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | Jan | 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 | Oct | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | Feb | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | Mar | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 20 mg/L | Jun | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 25 mg/L | May | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 20 mg/L | Sep | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | Nov | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | Apr | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 20 mg/L | Aug | 001 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 45 mg/L | Dec | 001 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 45 mg/L | Jan | 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 | Oct | 001 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 45 mg/L | Feb | 001 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 45 mg/L | Mar | 001 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 30 mg/L | Jun | 001 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 40 mg/L | May | 001 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 30 mg/L | Sep | 001 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 45 mg/L | Nov | 001 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 45 mg/L | Apr | 001 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 30 mg/L | Aug | 001 |
| pH | daily minimum | ≥ 6 SU | all year | 001 |
| pH | monthly average | report only (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 | ≤ 1.5 mg/L | Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.8 mg/L | Nov | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.1 mg/L | Sep | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2.7 mg/L | Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .8 mg/L | Aug | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .7 mg/L | Jul | 001 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.1 mg/L | May | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2.3 mg/L | Mar | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.8 mg/L | Apr | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .8 mg/L | Jun | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2.9 mg/L | Feb | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2.9 mg/L | Jan | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 5.5 mg/L | Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7 mg/L | Nov | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.7 mg/L | Sep | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 9.3 mg/L | Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.6 mg/L | Aug | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.3 mg/L | Jul | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4 mg/L | May | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 9.3 mg/L | Mar | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 6.8 mg/L | Apr | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.6 mg/L | Jun | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 9.3 mg/L | Feb | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 9.3 mg/L | Jan | 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 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | all year | 001 |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | all year | 001 |
| Arsenic, total recoverable | monthly average | report only (ug/L) | all year | 001 |
| Selenium, total recoverable | monthly average | report only (ug/L) | all year | 001 |
| Thallium, total recoverable | monthly average | report only (ug/L) | all year | 001 |
| Beryllium, total recoverable [as Be] | monthly average | report only (ug/L) | all year | 001 |
| Nickel, total recoverable | monthly average | report only (ug/L) | all year | 001 |
| Silver total recoverable | monthly average | report only (ug/L) | all year | 001 |
| Zinc, total recoverable | monthly average | report only (ug/L) | all year | 001 |
| Cadmium, total recoverable | monthly average | report only (ug/L) | all year | 001 |
| Lead, total recoverable | monthly average | report only (ug/L) | all year | 001 |
| Chromium, total recoverable | monthly average | report only (ug/L) | all year | 001 |
| Copper, total recoverable | monthly average | report only (ug/L) | all year | 001 |
| Antimony, total recoverable | monthly average | report only (ug/L) | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| E. coli | monthly geometric mean | ≤ 2358 #/100mL | Dec | 001 |
| E. coli | monthly geometric mean | ≤ 262 #/100mL | Jun | 001 |
| E. coli | monthly geometric mean | ≤ 2358 #/100mL | Nov | 001 |
| E. coli | monthly geometric mean | ≤ 2358 #/100mL | Feb | 001 |
| E. coli | monthly geometric mean | ≤ 262 #/100mL | Sep | 001 |
| E. coli | monthly geometric mean | ≤ 262 #/100mL | Jul | 001 |
| E. coli | monthly geometric mean | ≤ 2358 #/100mL | Jan | 001 |
| E. coli | monthly geometric mean | ≤ 262 #/100mL | May | 001 |
| E. coli | monthly geometric mean | ≤ 262 #/100mL | Apr | 001 |
| E. coli | monthly geometric mean | ≤ 2358 #/100mL | Mar | 001 |
| E. coli | monthly geometric mean | ≤ 262 #/100mL | Aug | 001 |
| E. coli | monthly geometric mean | ≤ 262 #/100mL | Oct | 001 |
| E. coli | weekly geometric mean | report only (#/100mL) | Dec | 001 |
| E. coli | weekly geometric mean | ≤ 4348 #/100mL | Jun | 001 |
| E. coli | weekly geometric mean | report only (#/100mL) | Nov | 001 |
| E. coli | weekly geometric mean | report only (#/100mL) | Feb | 001 |
| E. coli | weekly geometric mean | ≤ 4348 #/100mL | Sep | 001 |
| E. coli | weekly geometric mean | ≤ 4348 #/100mL | Jul | 001 |
| E. coli | weekly geometric mean | report only (#/100mL) | Jan | 001 |
| E. coli | weekly geometric mean | ≤ 4348 #/100mL | May | 001 |
| E. coli | weekly geometric mean | ≤ 4348 #/100mL | Apr | 001 |
| E. coli | weekly geometric mean | report only (#/100mL) | Mar | 001 |
| E. coli | weekly geometric mean | ≤ 4348 #/100mL | Aug | 001 |
| E. coli | weekly geometric mean | ≤ 4348 #/100mL | Oct | 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 |
| Mercury, total [as Hg] | monthly average | report only (ug/L) | all year | 001 |
| Sulfate | daily average | report only (mg/L) | all year | 001 |
| IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubia | daily minimum | ≥ 61 % | all year | 001 |
| IC25 Static Renewal 7 Day Chronic Pimephales | daily minimum | ≥ 61 % | 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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