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Water Supply, Osceola, Iowa. NPDES permit IA0082953, in force until Jul 31, 2031. Last 12 months: over a limit once (last August 2026), 2 required values missing. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit |
|---|---|---|---|
| August 2026 | pH, daily maximum | 66.64999 | ≤ 9 SU |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| pH | daily minimum | ≥ 6.5 SU | all year |
| pH | daily maximum | ≤ 9 SU | all year |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year |
| Parameter | New limit | New or tighter | Median, last 12 months | × new limit |
|---|---|---|---|---|
| Copper, total [as Cu], 30-day average | 0.017 mg/L | new | — | — |
| Copper, total [as Cu], 30-day average | 0.087 lb/d | new | — | — |
| Copper, total [as Cu], daily maximum | 0.139 lb/d | new | — | — |
| Copper, total [as Cu], daily maximum | 0.027 mg/L | new | — | — |
| Iron, total [as Fe], 30-day average | 1 mg/L | new | — | — |
| Iron, total [as Fe], 30-day average | 5.179 lb/d | new | — | — |
| Iron, total [as Fe], daily maximum | 5.179 lb/d | new | — | — |
| Iron, total [as Fe], daily maximum | 1 mg/L | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 4 mg/L (Feb) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 1 mg/L (Aug) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 20.5 lb/d (Feb) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 1.3 mg/L (Jun) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 6.8 lb/d (Jun) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 4.9 lb/d (Aug) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 1.1 mg/L (Sep) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 2.5 mg/L (Dec) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 5.5 lb/d (Sep) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 12.8 lb/d (Dec) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 1.5 mg/L (Apr) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 7.9 lb/d (Apr) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 8.1 lb/d (Oct) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 1.6 mg/L (Oct) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 17.6 lb/d (Jan) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 3.4 mg/L (Jan) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 5.2 lb/d (Jul) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 1 mg/L (Jul) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 12 lb/d (Nov) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 2.3 mg/L (Nov) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 3.4 mg/L (Mar) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 17.6 lb/d (Mar) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 9 lb/d (May) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 1.7 mg/L (May) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 16.6 lb/d (Jun) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 13.7 lb/d (Sep) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 2.7 mg/L (Aug) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 8.4 mg/L (Feb) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 2.7 mg/L (Sep) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 3.9 mg/L (Dec) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 13.7 lb/d (Aug) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 43.5 lb/d (Feb) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 3.2 mg/L (Jun) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 20.1 lb/d (Dec) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 4.7 mg/L (Apr) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 24.4 lb/d (Apr) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 2.7 mg/L (Oct) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 13.7 lb/d (Oct) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 103 lb/d (Jan) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 19.9 mg/L (Jan) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 16.6 lb/d (Jul) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 3.2 mg/L (Jul) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 2.7 mg/L (Nov) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 13.7 lb/d (Nov) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 3.9 mg/L (Mar) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 20.1 lb/d (Mar) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 3.2 mg/L (May) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 16.6 lb/d (May) | new | — | — |
Cited limits by parameter: Iowa's rules and the federal ones.
Same industry: the 48 Water Supply permits in Iowa.
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On EPA ECHO: Facility report · DMR history
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