Interstate Power and Light Company — NPDES permit IA0001783: limits, due date and EPA's record

Electric Services, major discharger, Burlington, Iowa. NPDES permit IA0001783, in force until Dec 31, 2030. Last 12 months: no values over a limit, 12 required values missing. Source: EPA ECHO, Oct 22, 2026.

Limits in force (49)

Parameter	Statistic	Limit	Months	Outfall
Toxicity [acute], Ceriodaphnia dubia	30-day average	≤ 1 N=0;Y=1	all year	001
Toxicity [acute], Pimephales promelas [Fathead Minnow]	30-day average	≤ 1 N=0;Y=1	all year	001
pH	daily minimum	≥ 6 SU	all year	002
pH	daily maximum	≤ 9 SU	all year	002
Solids, total suspended	30-day average	≤ 30 mg/L	all year	002
Solids, total suspended	daily maximum	≤ 45 mg/L	all year	002
Solids, total suspended	30-day average	≤ .25 lb/d	all year	002
Solids, total suspended	daily maximum	≤ .38 lb/d	all year	002
E. coli	geometric mean	≤ 126 #/100mL	Mar–Nov	002
BOD, carbonaceous [5 day, 20 C]	30-day average	≤ 25 mg/L	all year	002
BOD, carbonaceous [5 day, 20 C]	daily maximum	≤ 40 mg/L	all year	002
BOD, carbonaceous [5 day, 20 C]	30-day average	≤ .21 lb/d	all year	002
BOD, carbonaceous [5 day, 20 C]	daily maximum	≤ .33 lb/d	all year	002
Temperature, water deg. fahrenheit	30-day average	≤ 196.3 deg F	May	004
Temperature, water deg. fahrenheit	30-day average	≤ 144.3 deg F	Nov	004
Temperature, water deg. fahrenheit	30-day average	≤ 163.4 deg F	Jul	004
Temperature, water deg. fahrenheit	30-day average	≤ 192.3 deg F	Jun	004
Temperature, water deg. fahrenheit	30-day average	≤ 117.4 deg F	Jan	004
Temperature, water deg. fahrenheit	30-day average	≤ 121.5 deg F	Dec	004
Temperature, water deg. fahrenheit	30-day average	≤ 125.1 deg F	Feb	004
Temperature, water deg. fahrenheit	30-day average	≤ 156.3 deg F	Aug	004
Temperature, water deg. fahrenheit	30-day average	≤ 154.4 deg F	Sep	004
Temperature, water deg. fahrenheit	30-day average	≤ 159.7 deg F	Mar	004
Temperature, water deg. fahrenheit	30-day average	≤ 193.5 deg F	Apr	004
Temperature, water deg. fahrenheit	30-day average	≤ 144.1 deg F	Oct	004
Temperature, water deg. fahrenheit	daily maximum	≤ 212 deg F	May	004
Temperature, water deg. fahrenheit	daily maximum	≤ 212 deg F	Nov	004
Temperature, water deg. fahrenheit	daily maximum	≤ 163.4 deg F	Jul	004
Temperature, water deg. fahrenheit	daily maximum	≤ 212 deg F	Jun	004
Temperature, water deg. fahrenheit	daily maximum	≤ 212 deg F	Jan	004
Temperature, water deg. fahrenheit	daily maximum	≤ 212 deg F	Dec	004
Temperature, water deg. fahrenheit	daily maximum	≤ 212 deg F	Feb	004
Temperature, water deg. fahrenheit	daily maximum	≤ 156.3 deg F	Aug	004
Temperature, water deg. fahrenheit	daily maximum	≤ 207.4 deg F	Sep	004
Temperature, water deg. fahrenheit	daily maximum	≤ 212 deg F	Mar	004
Temperature, water deg. fahrenheit	daily maximum	≤ 212 deg F	Apr	004
Temperature, water deg. fahrenheit	daily maximum	≤ 212 deg F	Oct	004
Temperature, length of excursion	daily maximum	≤ 87.6 hr/12mo	all year	004
Chlorine, total residual	daily maximum	≤ .2 mg/L	all year	004
Chlorine, total residual	daily maximum	≤ 13.1 lb/d	all year	004
Chlorination duration	daily maximum	≤ 2 hr/d	all year	004
pH	daily minimum	≥ 6 SU	all year	008
pH	daily maximum	≤ 9 SU	all year	008
Solids, total suspended	30-day average	≤ 30 mg/L	all year	008
Solids, total suspended	daily maximum	≤ 100 mg/L	all year	008
Oil & Grease	30-day average	≤ 15 mg/L	all year	008
Oil & Grease	daily maximum	≤ 20 mg/L	all year	008
Oil & Grease	30-day average	≤ 1.7 lb/d	all year	008
Oil & Grease	daily maximum	≤ 2.26 lb/d	all year	008

New limits from Jan 1, 2030

Parameter	New limit	New or tighter	Median, last 12 months	× new limit
Chlorine, total residual, daily maximum	0.019 mg/L	tighter	—	—

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/IA0001783 · MCP: https://passage-data.com/mcp