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Electric Services, major discharger, Pleasant Hill, Iowa. NPDES permit IA0077941, in force until Jun 30, 2028. Last 12 months: over a limit once (last May 2026), 1 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| May 2026 | Chromium, total [as Cr], daily maximum | .221 | ≤ .2 mg/L | 11% |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| pH | daily minimum | ≥ 6 SU | all year |
| pH | daily maximum | ≤ 9 SU | all year |
| Chromium, total [as Cr] | 30-day average | ≤ .2 mg/L | all year |
| Chromium, total [as Cr] | daily maximum | ≤ .2 mg/L | all year |
| Zinc, total [as Zn] | 30-day average | ≤ 1 mg/L | all year |
| Zinc, total [as Zn] | daily maximum | ≤ 1 mg/L | all year |
| Chlorine, total residual | 30-day average | ≤ .13 mg/L | all year |
| Chlorine, total residual | daily maximum | ≤ .13 mg/L | all year |
| Chlorine, total residual | 30-day average | ≤ .054 lb/d | all year |
| Chlorine, total residual | daily maximum | ≤ .054 lb/d | all year |
| Chlorine, free available | 30-day average | ≤ .2 mg/L | all year |
| Chlorine, free available | daily maximum | ≤ .5 mg/L | all year |
| Toxicity [acute], Ceriodaphnia dubia | daily maximum | ≤ 1 N=0;Y=1 | all year |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | daily maximum | ≤ 1 N=0;Y=1 | all year |
| Chlorination duration | daily maximum | ≤ 2 hr/d | all year |
Cited limits by parameter: Iowa's rules and the federal ones.
Same industry: the 14 Electric Services permits in Iowa.
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On EPA ECHO: Facility report · DMR history
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