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Subdividers And Developers, Columbus, Indiana. NPDES permit IN0051683, in force until Sep 30, 2027. Last 12 months: over a limit 9 times (last July 2026), 1 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| March 2026 | Nitrogen, ammonia total [as N], maximum weekly average | 1.2 lb/d | ≤ .6 lb/d | 100% |
| March 2026 | Nitrogen, ammonia total [as N], maximum weekly average | 2.9 mg/L | ≤ 2.4 mg/L | 21% |
| May 2026 | Nitrogen, ammonia total [as N], maximum weekly average | .93 lb/d | ≤ .4 lb/d | 133% |
| May 2026 | Nitrogen, ammonia total [as N], maximum weekly average | 3.5 mg/L | ≤ 1.6 mg/L | 119% |
| June 2026 | Nitrogen, ammonia total [as N], monthly average | .4 lb/d | ≤ .3 lb/d | 33% |
| June 2026 | Nitrogen, ammonia total [as N], maximum weekly average | 1.9 lb/d | ≤ .4 lb/d | 375% |
| June 2026 | Nitrogen, ammonia total [as N], maximum weekly average | 2.8 mg/L | ≤ 1.6 mg/L | 75% |
| June 2026 | Solids, total suspended, maximum weekly average | 7.4 lb/d | ≤ 6.8 lb/d | 9% |
| July 2026 | Nitrogen, ammonia total [as N], maximum weekly average | 2.27 mg/L | ≤ 1.6 mg/L | 42% |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Oxygen, dissolved [DO] | daily average minimum | ≥ 6 mg/L | May–Nov |
| Oxygen, dissolved [DO] | daily average minimum | ≥ 5 mg/L | Jan, Feb, Mar, Apr, Dec |
| pH | daily minimum | ≥ 6 SU | all year |
| pH | daily maximum | ≤ 9 SU | all year |
| Solids, total suspended | monthly average | ≤ 30 mg/L | Jan, Feb, Mar, Apr, Dec |
| Solids, total suspended | monthly average | ≤ 18 mg/L | May–Nov |
| Solids, total suspended | maximum weekly average | ≤ 45 mg/L | Jan, Feb, Mar, Apr, Dec |
| Solids, total suspended | maximum weekly average | ≤ 27 mg/L | May–Nov |
| Solids, total suspended | monthly average | ≤ 7.5 lb/d | Jan, Feb, Mar, Apr, Dec |
| Solids, total suspended | monthly average | ≤ 4.5 lb/d | May–Nov |
| Solids, total suspended | maximum weekly average | ≤ 11.3 lb/d | Jan, Feb, Mar, Apr, Dec |
| Solids, total suspended | maximum weekly average | ≤ 6.8 lb/d | May–Nov |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.1 mg/L | May–Nov |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.6 mg/L | Jan, Feb, Mar, Apr, Dec |
| Nitrogen, ammonia total [as N] | maximum weekly average | ≤ 1.6 mg/L | May–Nov |
| Nitrogen, ammonia total [as N] | maximum weekly average | ≤ 2.4 mg/L | Jan, Feb, Mar, Apr, Dec |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .3 lb/d | May–Nov |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .4 lb/d | Jan, Feb, Mar, Apr, Dec |
| Nitrogen, ammonia total [as N] | maximum weekly average | ≤ .4 lb/d | May–Nov |
| Nitrogen, ammonia total [as N] | maximum weekly average | ≤ .6 lb/d | Jan, Feb, Mar, Apr, Dec |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year |
| E. coli, colony forming units [CFU] | monthly geometric mean | ≤ 125 CFU/100mL | Apr–Oct |
| E. coli, colony forming units [CFU] | daily maximum | ≤ 235 CFU/100mL | Apr–Oct |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 25 mg/L | Jan, Feb, Mar, Apr, Dec |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 15 mg/L | May–Nov |
| BOD, carbonaceous [5 day, 20 C] | maximum weekly average | ≤ 40 mg/L | Jan, Feb, Mar, Apr, Dec |
| BOD, carbonaceous [5 day, 20 C] | maximum weekly average | ≤ 23 mg/L | May–Nov |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 6.3 lb/d | Jan, Feb, Mar, Apr, Dec |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 3.8 lb/d | May–Nov |
| BOD, carbonaceous [5 day, 20 C] | maximum weekly average | ≤ 10 lb/d | Jan, Feb, Mar, Apr, Dec |
| BOD, carbonaceous [5 day, 20 C] | maximum weekly average | ≤ 5.8 lb/d | May–Nov |
| Flow, total | monthly total | report only (Mgal/mo) | all year |
Cited limits by parameter: Indiana's rules and the federal ones.
Same industry: the 109 Real Estate permits in Indiana.
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