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Green Valley Chemical Corporation

Nitrogenous Fertilizers, Creston, Iowa. NPDES permit IA0003964 expired Apr 30, 2016; its limits still apply. Last 12 months: over a limit 8 times (last June 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due: About 15 days after each period: form A monthly (14 values)
Last report on file: September 2026
Oct 2024 – Sep 2025: 14 values over a limit, 0 required values missing, 0 of 12 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period ending	Parameter	Reported	Limit	Over by
October 2025	Solids, total suspended, 30-day average	89	≤ 30 mg/L	197%
October 2025	Solids, total suspended, daily maximum	89	≤ 45 mg/L	98%
November 2025	Solids, total suspended, 30-day average	70	≤ 30 mg/L	133%
November 2025	Solids, total suspended, daily maximum	70	≤ 45 mg/L	56%
May 2026	Solids, total suspended, 30-day average	50	≤ 30 mg/L	67%
May 2026	Solids, total suspended, daily maximum	50	≤ 45 mg/L	11%
June 2026	Solids, total suspended, 30-day average	50	≤ 30 mg/L	67%
June 2026	Solids, total suspended, daily maximum	50	≤ 45 mg/L	11%

Limits in force (14)

Parameter	Statistic	Limit	Months
BOD, 5-day, 20 deg. C	30-day average	≤ 30 mg/L	all year
BOD, 5-day, 20 deg. C	daily maximum	≤ 45 mg/L	all year
BOD, 5-day, 20 deg. C	30-day average	≤ 50 lb/d	all year
BOD, 5-day, 20 deg. C	daily maximum	≤ 75 lb/d	all year
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
Solids, total suspended	30-day average	≤ 50 lb/d	all year
Solids, total suspended	daily maximum	≤ 75 lb/d	all year
Nitrogen, ammonia total [as N]	30-day average	≤ 3.6 mg/L	all year
Nitrogen, ammonia total [as N]	daily maximum	≤ 7.2 mg/L	all year
Nitrogen, ammonia total [as N]	30-day average	≤ 6 lb/d	all year
Nitrogen, ammonia total [as N]	daily maximum	≤ 12 lb/d	all year

How strict are these limits?

pH, daily minimum at least 6.5 SU — stricter than 60% of 423 other minor industrial and other permits in Iowa; 39% have the same limit
Nitrogen, ammonia total [as N], daily maximum 7.2 mg/L — stricter than 48% of 131 other minor industrial and other permits in Iowa
Solids, total suspended, 30-day average 30 mg/L — stricter than 40% of 289 other minor industrial and other permits in Iowa; 56% have the same limit

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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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/IA0003964 · MCP: https://passage-data.com/mcp