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Reg Ralston LLC

Industrial Organic Chemicals, Ralston, Iowa. NPDES permit IA0052331, in force until Jul 31, 2031. Last 12 months: no values over a limit, 2 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (17 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 2 of 12 reports late

Limits in force (83)

ParameterStatisticLimitMonths
Temperature, water deg. fahrenheit30-day average≤ 93.9 deg FJul
Temperature, water deg. fahrenheit30-day average≤ 71.6 deg FDec
Temperature, water deg. fahrenheit30-day average≤ 93.6 deg FJun
Temperature, water deg. fahrenheit30-day average≤ 81.6 deg FNov
Temperature, water deg. fahrenheit30-day average≤ 93.9 deg FAug
Temperature, water deg. fahrenheit30-day average≤ 93.9 deg FSep
Temperature, water deg. fahrenheit30-day average≤ 80.4 deg FFeb
Temperature, water deg. fahrenheit30-day average≤ 88.4 deg FMay
Temperature, water deg. fahrenheit30-day average≤ 88.7 deg FMar
Temperature, water deg. fahrenheit30-day average≤ 92.1 deg FOct
Temperature, water deg. fahrenheit30-day average≤ 70.9 deg FJan
Temperature, water deg. fahrenheit30-day average≤ 84.6 deg FApr
Temperature, water deg. fahrenheitdaily maximum≤ 93.9 deg FJul
Temperature, water deg. fahrenheitdaily maximum≤ 93.9 deg FDec
Temperature, water deg. fahrenheitdaily maximum≤ 93.9 deg FJun
Temperature, water deg. fahrenheitdaily maximum≤ 93.9 deg FNov
Temperature, water deg. fahrenheitdaily maximum≤ 93.9 deg FAug
Temperature, water deg. fahrenheitdaily maximum≤ 93.9 deg FSep
Temperature, water deg. fahrenheitdaily maximum≤ 93.9 deg FFeb
Temperature, water deg. fahrenheitdaily maximum≤ 93.9 deg FMay
Temperature, water deg. fahrenheitdaily maximum≤ 93.9 deg FMar
Temperature, water deg. fahrenheitdaily maximum≤ 93.9 deg FOct
Temperature, water deg. fahrenheitdaily maximum≤ 93.9 deg FJan
Temperature, water deg. fahrenheitdaily maximum≤ 93.9 deg FApr
pHdaily minimum≥ 6.5 SUall year
pHdaily maximum≤ 9 SUall year
Nitrogen, ammonia total [as N]30-day average≤ 1.6 mg/LOct
Nitrogen, ammonia total [as N]30-day average≤ 1 mg/LJul
Nitrogen, ammonia total [as N]30-day average≤ 3.4 mg/LMar
Nitrogen, ammonia total [as N]30-day average≤ 1.3 mg/LJun
Nitrogen, ammonia total [as N]30-day average≤ 1.8 mg/LMay
Nitrogen, ammonia total [as N]30-day average≤ 4 mg/LFeb
Nitrogen, ammonia total [as N]30-day average≤ 1.5 mg/LApr
Nitrogen, ammonia total [as N]30-day average≤ 1.1 mg/LSep
Nitrogen, ammonia total [as N]30-day average≤ 2.5 mg/LDec
Nitrogen, ammonia total [as N]30-day average≤ 3.4 mg/LJan
Nitrogen, ammonia total [as N]30-day average≤ 2.3 mg/LNov
Nitrogen, ammonia total [as N]30-day average≤ 1 mg/LAug
Nitrogen, ammonia total [as N]daily maximum≤ 5.8 mg/LOct
Nitrogen, ammonia total [as N]daily maximum≤ 5.8 mg/LJul
Nitrogen, ammonia total [as N]daily maximum≤ 8.5 mg/LMar
Nitrogen, ammonia total [as N]daily maximum≤ 5.8 mg/LJun
Nitrogen, ammonia total [as N]daily maximum≤ 4.8 mg/LMay
Nitrogen, ammonia total [as N]daily maximum≤ 7 mg/LFeb
Nitrogen, ammonia total [as N]daily maximum≤ 5.8 mg/LApr
Nitrogen, ammonia total [as N]daily maximum≤ 4.8 mg/LSep
Nitrogen, ammonia total [as N]daily maximum≤ 7 mg/LDec
Nitrogen, ammonia total [as N]daily maximum≤ 10.2 mg/LJan
Nitrogen, ammonia total [as N]daily maximum≤ 5.8 mg/LNov
Nitrogen, ammonia total [as N]daily maximum≤ 5.8 mg/LAug
Nitrogen, ammonia total [as N]30-day average≤ .8 lb/dOct
Nitrogen, ammonia total [as N]30-day average≤ .6 lb/dJul
Nitrogen, ammonia total [as N]30-day average≤ 1.8 lb/dMar
Nitrogen, ammonia total [as N]30-day average≤ .7 lb/dJun
Nitrogen, ammonia total [as N]30-day average≤ .9 lb/dMay
Nitrogen, ammonia total [as N]30-day average≤ 2.1 lb/dFeb
Nitrogen, ammonia total [as N]30-day average≤ .8 lb/dApr
Nitrogen, ammonia total [as N]30-day average≤ .6 lb/dSep
Nitrogen, ammonia total [as N]30-day average≤ 1.3 lb/dDec
Nitrogen, ammonia total [as N]30-day average≤ 1.8 lb/dJan
Nitrogen, ammonia total [as N]30-day average≤ 1.3 lb/dNov
Nitrogen, ammonia total [as N]30-day average≤ .5 lb/dAug
Nitrogen, ammonia total [as N]daily maximum≤ 3.1 lb/dOct
Nitrogen, ammonia total [as N]daily maximum≤ 3.2 lb/dJul
Nitrogen, ammonia total [as N]daily maximum≤ 4.6 lb/dMar
Nitrogen, ammonia total [as N]daily maximum≤ 3.1 lb/dJun
Nitrogen, ammonia total [as N]daily maximum≤ 2.6 lb/dMay
Nitrogen, ammonia total [as N]daily maximum≤ 3.7 lb/dFeb
Nitrogen, ammonia total [as N]daily maximum≤ 3.1 lb/dApr
Nitrogen, ammonia total [as N]daily maximum≤ 2.6 lb/dSep
Nitrogen, ammonia total [as N]daily maximum≤ 3.8 lb/dDec
Nitrogen, ammonia total [as N]daily maximum≤ 5.5 lb/dJan
Nitrogen, ammonia total [as N]daily maximum≤ 3.1 lb/dNov
Nitrogen, ammonia total [as N]daily maximum≤ 3.1 lb/dAug
Nitrogen, nitrate total [as N]daily maximum≤ 9.5 mg/Lall year
Iron, total [as Fe]30-day average≤ 1 mg/Lall year
Iron, total [as Fe]daily maximum≤ 1 mg/Lall year
Iron, total [as Fe]30-day average≤ .537 lb/dall year
Iron, total [as Fe]daily maximum≤ .537 lb/dall year
Chlorine, total residual30-day average≤ .011 mg/Lall year
Chlorine, total residualdaily maximum≤ .019 mg/Lall year
Chlorine, total residual30-day average≤ .008 lb/dall year
Chlorine, total residualdaily maximum≤ .014 lb/dall year

How strict are these limits?

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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Your permit document is the final word. As JSON: /api/v1/permits/IA0052331 · MCP: https://passage-data.com/mcp