University of Northern Iowa — NPDES permit IA0063941: limits, due date and EPA's record

Electric Services, Cedar Falls, Iowa. NPDES permit IA0063941 expired Apr 30, 2026; its limits still apply. Last 12 months: no values over a limit, 27 of 177 reports late. Source: EPA ECHO, Oct 22, 2026.

Limits in force (111)

Parameter	Statistic	Limit	Months	Outfall
Temperature, water deg. fahrenheit	30-day average	≤ 97.5 deg F	Aug	003
Temperature, water deg. fahrenheit	30-day average	≤ 93 deg F	Mar	003
Temperature, water deg. fahrenheit	30-day average	≤ 84.9 deg F	Nov	003
Temperature, water deg. fahrenheit	30-day average	≤ 101.3 deg F	Oct	003
Temperature, water deg. fahrenheit	30-day average	≤ 88.6 deg F	Apr	003
Temperature, water deg. fahrenheit	30-day average	≤ 74.3 deg F	Dec	003
Temperature, water deg. fahrenheit	30-day average	≤ 73.4 deg F	Jan	003
Temperature, water deg. fahrenheit	30-day average	≤ 84.7 deg F	Feb	003
Temperature, water deg. fahrenheit	30-day average	≤ 91.6 deg F	May	003
Temperature, water deg. fahrenheit	30-day average	≤ 99.4 deg F	Sep	003
Temperature, water deg. fahrenheit	30-day average	≤ 97.9 deg F	Jul	003
Temperature, water deg. fahrenheit	30-day average	≤ 98.2 deg F	Jun	003
Temperature, water deg. fahrenheit	daily maximum	≤ 97.5 deg F	Aug	003
Temperature, water deg. fahrenheit	daily maximum	≤ 109.2 deg F	Mar	003
Temperature, water deg. fahrenheit	daily maximum	≤ 106.1 deg F	Nov	003
Temperature, water deg. fahrenheit	daily maximum	≤ 101.9 deg F	Oct	003
Temperature, water deg. fahrenheit	daily maximum	≤ 104.7 deg F	Apr	003
Temperature, water deg. fahrenheit	daily maximum	≤ 109.5 deg F	Dec	003
Temperature, water deg. fahrenheit	daily maximum	≤ 111.2 deg F	Jan	003
Temperature, water deg. fahrenheit	daily maximum	≤ 111.5 deg F	Feb	003
Temperature, water deg. fahrenheit	daily maximum	≤ 102.3 deg F	May	003
Temperature, water deg. fahrenheit	daily maximum	≤ 99.4 deg F	Sep	003
Temperature, water deg. fahrenheit	daily maximum	≤ 97.9 deg F	Jul	003
Temperature, water deg. fahrenheit	daily maximum	≤ 99.9 deg F	Jun	003
pH	daily minimum	≥ 6.5 SU	all year	003
pH	daily maximum	≤ 9 SU	all year	003
Solids, total suspended	30-day average	≤ 30 mg/L	all year	003
Solids, total suspended	daily maximum	≤ 100 mg/L	all year	003
Solids, total suspended	30-day average	≤ 5.3 lb/d	all year	003
Solids, total suspended	daily maximum	≤ 17.7 lb/d	all year	003
Oil & Grease	30-day average	≤ 15 mg/L	all year	003
Oil & Grease	daily maximum	≤ 20 mg/L	all year	003
Oil & Grease	30-day average	≤ 2.7 lb/d	all year	003
Oil & Grease	daily maximum	≤ 3.5 lb/d	all year	003
Temperature, water deg. fahrenheit	30-day average	≤ 99.4 deg F	Sep	004
Temperature, water deg. fahrenheit	30-day average	≤ 73.4 deg F	Jan	004
Temperature, water deg. fahrenheit	30-day average	≤ 93 deg F	Mar	004
Temperature, water deg. fahrenheit	30-day average	≤ 88.6 deg F	Apr	004
Temperature, water deg. fahrenheit	30-day average	≤ 98.2 deg F	Jun	004
Temperature, water deg. fahrenheit	30-day average	≤ 101.3 deg F	Oct	004
Temperature, water deg. fahrenheit	30-day average	≤ 91.6 deg F	May	004
Temperature, water deg. fahrenheit	30-day average	≤ 84.9 deg F	Nov	004
Temperature, water deg. fahrenheit	30-day average	≤ 84.7 deg F	Feb	004
Temperature, water deg. fahrenheit	30-day average	≤ 97.5 deg F	Aug	004
Temperature, water deg. fahrenheit	30-day average	≤ 97.9 deg F	Jul	004
Temperature, water deg. fahrenheit	30-day average	≤ 74.3 deg F	Dec	004
Temperature, water deg. fahrenheit	daily maximum	≤ 99.4 deg F	Sep	004
Temperature, water deg. fahrenheit	daily maximum	≤ 111.2 deg F	Jan	004
Temperature, water deg. fahrenheit	daily maximum	≤ 109.2 deg F	Mar	004
Temperature, water deg. fahrenheit	daily maximum	≤ 104.7 deg F	Apr	004
Temperature, water deg. fahrenheit	daily maximum	≤ 99.9 deg F	Jun	004
Temperature, water deg. fahrenheit	daily maximum	≤ 101.9 deg F	Oct	004
Temperature, water deg. fahrenheit	daily maximum	≤ 102.3 deg F	May	004
Temperature, water deg. fahrenheit	daily maximum	≤ 106.1 deg F	Nov	004
Temperature, water deg. fahrenheit	daily maximum	≤ 111.5 deg F	Feb	004
Temperature, water deg. fahrenheit	daily maximum	≤ 97.5 deg F	Aug	004
Temperature, water deg. fahrenheit	daily maximum	≤ 97.9 deg F	Jul	004
Temperature, water deg. fahrenheit	daily maximum	≤ 109.5 deg F	Dec	004
pH	daily minimum	≥ 6.5 SU	all year	004
pH	daily maximum	≤ 9 SU	all year	004
Oil & Grease	30-day average	≤ 7.4 mg/L	all year	004
Oil & Grease	daily maximum	≤ 8.4 mg/L	all year	004
Oil & Grease	30-day average	≤ .72 lb/d	all year	004
Oil & Grease	daily maximum	≤ .81 lb/d	all year	004
Chromium, hexavalent [as Cr]	30-day average	≤ .012 mg/L	all year	004
Chromium, hexavalent [as Cr]	daily maximum	≤ .016 mg/L	all year	004
Chromium, hexavalent [as Cr]	30-day average	≤ .004 lb/d	all year	004
Chromium, hexavalent [as Cr]	daily maximum	≤ .006 lb/d	all year	004
Zinc, total [as Zn]	30-day average	≤ .217 mg/L	all year	004
Zinc, total [as Zn]	daily maximum	≤ .217 mg/L	all year	004
Zinc, total [as Zn]	30-day average	≤ .081 lb/d	all year	004
Zinc, total [as Zn]	daily maximum	≤ .081 lb/d	all year	004
Chlorine, total residual	30-day average	≤ .038 mg/L	all year	004
Chlorine, total residual	daily maximum	≤ .046 mg/L	all year	004
Chlorine, total residual	30-day average	≤ .011 lb/d	all year	004
Chlorine, total residual	daily maximum	≤ .017 lb/d	all year	004
Chlorination duration	daily maximum	≤ 2 hr/d	all year	004
Temperature, water deg. fahrenheit	30-day average	≤ 88.6 deg F	Apr	013
Temperature, water deg. fahrenheit	30-day average	≤ 74.3 deg F	Dec	013
Temperature, water deg. fahrenheit	30-day average	≤ 97.9 deg F	Jul	013
Temperature, water deg. fahrenheit	30-day average	≤ 101.3 deg F	Oct	013
Temperature, water deg. fahrenheit	30-day average	≤ 99.4 deg F	Sep	013
Temperature, water deg. fahrenheit	30-day average	≤ 93 deg F	Mar	013
Temperature, water deg. fahrenheit	30-day average	≤ 84.9 deg F	Nov	013
Temperature, water deg. fahrenheit	30-day average	≤ 97.5 deg F	Aug	013
Temperature, water deg. fahrenheit	30-day average	≤ 91.6 deg F	May	013
Temperature, water deg. fahrenheit	30-day average	≤ 73.4 deg F	Jan	013
Temperature, water deg. fahrenheit	30-day average	≤ 98.2 deg F	Jun	013
Temperature, water deg. fahrenheit	30-day average	≤ 84.7 deg F	Feb	013
Temperature, water deg. fahrenheit	daily maximum	≤ 104.7 deg F	Apr	013
Temperature, water deg. fahrenheit	daily maximum	≤ 109.5 deg F	Dec	013
Temperature, water deg. fahrenheit	daily maximum	≤ 97.9 deg F	Jul	013
Temperature, water deg. fahrenheit	daily maximum	≤ 101.9 deg F	Oct	013
Temperature, water deg. fahrenheit	daily maximum	≤ 99.4 deg F	Sep	013
Temperature, water deg. fahrenheit	daily maximum	≤ 109.2 deg F	Mar	013
Temperature, water deg. fahrenheit	daily maximum	≤ 106.1 deg F	Nov	013
Temperature, water deg. fahrenheit	daily maximum	≤ 97.5 deg F	Aug	013
Temperature, water deg. fahrenheit	daily maximum	≤ 102.3 deg F	May	013
Temperature, water deg. fahrenheit	daily maximum	≤ 111.2 deg F	Jan	013
Temperature, water deg. fahrenheit	daily maximum	≤ 99.9 deg F	Jun	013
Temperature, water deg. fahrenheit	daily maximum	≤ 111.5 deg F	Feb	013
pH	daily minimum	≥ 6.5 SU	all year	013
pH	daily maximum	≤ 9 SU	all year	013
Solids, total suspended	30-day average	≤ 30 mg/L	all year	013
Solids, total suspended	daily maximum	≤ 100 mg/L	all year	013
Solids, total suspended	30-day average	≤ 5.8 lb/d	all year	013
Solids, total suspended	daily maximum	≤ 19.2 lb/d	all year	013
Oil & Grease	30-day average	≤ 15 mg/L	all year	013
Oil & Grease	daily maximum	≤ 20 mg/L	all year	013
Oil & Grease	30-day average	≤ 2.9 lb/d	all year	013
Oil & Grease	daily maximum	≤ 3.8 lb/d	all year	013

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/IA0063941 · MCP: https://passage-data.com/mcp