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Agricultural Chemicals, Webster City, Iowa. NPDES permit IA0070033, in force until Sep 30, 2029. Last 12 months: over a limit once (last April 2026), 15 required values missing, 1 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| April 2026 | Phenols, 30-day average | .067 | ≤ .05 mg/L | 34% |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| pH | daily minimum | ≥ 6.5 SU | all year |
| pH | 30-day average | ≤ 9 SU | all year |
| Solids, total suspended | 30-day average | ≤ 80 mg/L | all year |
| Solids, total suspended | 7-day average | ≤ 120 mg/L | all year |
| Chloride [as Cl] | 30-day average | ≤ 389 mg/L | all year |
| Chloride [as Cl] | daily maximum | ≤ 629 mg/L | all year |
| Atrazine | 30-day average | ≤ 1.125 mg/L | all year |
| Atrazine | daily maximum | ≤ 1.125 mg/L | all year |
| Metolachlor | 30-day average | ≤ 1.5 mg/L | all year |
| Metolachlor | daily maximum | ≤ 1.5 mg/L | all year |
| Phenols | 30-day average | ≤ .05 mg/L | all year |
| Phenols | daily maximum | ≤ 2.5 mg/L | all year |
| Annual Nitrate Nitrogen Discharged | daily maximum | ≤ 1241 lb/yr | all year |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 25 mg/L | all year |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 40 mg/L | all year |
| Parameter | New limit | New or tighter | Median, last 12 months | × new limit |
|---|---|---|---|---|
| E. coli, geometric mean | 428 #/100mL (Mar–Nov) | new | — | — |
| Glyphosate, total, 30-day average | 271 mg/L | new | — | — |
| Glyphosate, total, daily maximum | 271 mg/L | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 1.2 mg/L (Aug) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 1.9 mg/L (Oct) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 4.7 mg/L (Feb) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 4.1 mg/L (Jan) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 2.1 mg/L (May) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 1.6 mg/L (Jun) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 2.8 mg/L (Nov) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 3 mg/L (Dec) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 1.9 mg/L (Apr) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 4 mg/L (Mar) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 1.3 mg/L (Jul) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 1.3 mg/L (Sep) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 8.7 mg/L (Feb) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 20.3 mg/L (Jan) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 2.8 mg/L (Nov) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 3.4 mg/L (May) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 2.8 mg/L (Oct) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 3.5 mg/L (Jun) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 2.9 mg/L (Aug) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 4 mg/L (Dec) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 4.9 mg/L (Apr) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 4 mg/L (Mar) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 3.5 mg/L (Jul) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 2.9 mg/L (Sep) | new | — | — |
| Oxygen demand, chem. [high level] [COD], daily maximum | 41 mg/L | new | — | — |
| Sulfate, total [as SO4], 30-day average | 1520 mg/L | new | — | — |
| Sulfate, total [as SO4], daily maximum | 1520 mg/L | new | — | — |
Cited limits by parameter: Iowa's rules and the federal ones.
Same industry: the 57 Chemicals and Allied Products permits in Iowa.
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