Passage Data · Check a report · Use it from your AI

Big River Resources, LLC

Industrial Organic Chemicals, Dyersville, Iowa. NPDES permit IA0081302, in force until Feb 28, 2031. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due: About 15 days after each period: form A monthly (11 values)
Last report on file: August 2026
Oct 2024 – Sep 2025: 0 values over a limit, 0 required values missing, 0 of 12 reports late

Limits in force (11)

Parameter	Statistic	Limit	Months
Oxygen, dissolved [DO]	daily minimum	≥ 5 mg/L	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	≤ 78.31 lb/d	all year
Solids, total suspended	daily maximum	≤ 117.47 lb/d	all year
Chlorine, total residual	30-day average	≤ .011 mg/L	all year
Chlorine, total residual	daily maximum	≤ .019 mg/L	all year
Chlorine, total residual	30-day average	≤ .086 lb/d	all year
Chlorine, total residual	daily maximum	≤ .15 lb/d	all year

New limits from Feb 1, 2031

Parameter	New limit	New or tighter	Median, last 12 months	× new limit
Chloride [as Cl], 30-day average	1987 lb/d	new	—	—
Chloride [as Cl], 30-day average	389 mg/L	new	—	—
Chloride [as Cl], daily maximum	3215 lb/d	new	—	—
Chloride [as Cl], daily maximum	629 mg/L	new	—	—

How strict are these limits?

Chlorine, total residual, 30-day average .011 mg/L — stricter than 76% of 106 other minor industrial and other permits in Iowa; 16% have the same limit
Chlorine, total residual, daily maximum .019 mg/L — stricter than 74% of 107 other minor industrial and other permits in Iowa; 25% have the same limit
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

Cited limits by parameter: Iowa's rules and the federal ones.

Same industry: the 57 Chemicals and Allied Products permits in Iowa.

Check this month's numbers Email me before each report is due

· Save this facility as a site · Superfund sites nearby · Your permits on one board

On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/IA0081302 · MCP: https://passage-data.com/mcp