Cedar Falls Municipal Electric Utility — NPDES permit IA0002534: limits, due date and EPA's record

Electric Services, Cedar Falls, Iowa. NPDES permit IA0002534, in force until May 31, 2027. Last 12 months: over a limit 2 times (last November 2025), 15 required values missing. Source: EPA ECHO, Oct 22, 2026.

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

Period ending	Parameter	Reported	Limit	Over by
November 2025	Copper, total [as Cu], 30-day average	.0371	≤ .01874 mg/L	98%
November 2025	Copper, total [as Cu], daily maximum	.1113	≤ .02851 mg/L	290%

Limits in force (56)

Parameter	Statistic	Limit	Months	Outfall
Temperature, water deg. fahrenheit	30-day average	≤ 89.6 deg F	Jul	001
Temperature, water deg. fahrenheit	30-day average	≤ 84.9 deg F	Oct	001
Temperature, water deg. fahrenheit	30-day average	≤ 71.6 deg F	Dec	001
Temperature, water deg. fahrenheit	30-day average	≤ 87 deg F	Jun	001
Temperature, water deg. fahrenheit	30-day average	≤ 64 deg F	Jan	001
Temperature, water deg. fahrenheit	30-day average	≤ 89.6 deg F	Aug	001
Temperature, water deg. fahrenheit	30-day average	≤ 82.5 deg F	Apr	001
Temperature, water deg. fahrenheit	30-day average	≤ 80.6 deg F	Nov	001
Temperature, water deg. fahrenheit	30-day average	≤ 75.9 deg F	Mar	001
Temperature, water deg. fahrenheit	30-day average	≤ 64 deg F	Feb	001
Temperature, water deg. fahrenheit	30-day average	≤ 87.9 deg F	Sep	001
Temperature, water deg. fahrenheit	30-day average	≤ 82.5 deg F	May	001
Temperature, water deg. fahrenheit	daily maximum	≤ 89.6 deg F	Jul	001
Temperature, water deg. fahrenheit	daily maximum	≤ 89.8 deg F	Oct	001
Temperature, water deg. fahrenheit	daily maximum	≤ 90.4 deg F	Dec	001
Temperature, water deg. fahrenheit	daily maximum	≤ 89.8 deg F	Jun	001
Temperature, water deg. fahrenheit	daily maximum	≤ 90.5 deg F	Jan	001
Temperature, water deg. fahrenheit	daily maximum	≤ 89.6 deg F	Aug	001
Temperature, water deg. fahrenheit	daily maximum	≤ 89.9 deg F	Apr	001
Temperature, water deg. fahrenheit	daily maximum	≤ 90.2 deg F	Nov	001
Temperature, water deg. fahrenheit	daily maximum	≤ 90.3 deg F	Mar	001
Temperature, water deg. fahrenheit	daily maximum	≤ 90.5 deg F	Feb	001
Temperature, water deg. fahrenheit	daily maximum	≤ 89.8 deg F	Sep	001
Temperature, water deg. fahrenheit	daily maximum	≤ 89.9 deg F	May	001
pH	daily minimum	≥ 6.5 SU	all year	001
pH	daily maximum	≤ 9 SU	all year	001
Copper, total [as Cu]	30-day average	≤ .01874 mg/L	all year	001
Copper, total [as Cu]	daily maximum	≤ .02851 mg/L	all year	001
Copper, total [as Cu]	30-day average	≤ 1.324 lb/d	all year	001
Copper, total [as Cu]	daily maximum	≤ 2.079 lb/d	all year	001
Chlorine, total residual	30-day average	≤ .012 mg/L	all year	001
Chlorine, total residual	daily maximum	≤ .02 mg/L	all year	001
Chlorine, total residual	30-day average	≤ .864 lb/d	all year	001
Chlorine, total residual	daily maximum	≤ 1.469 lb/d	all year	001
Chromium, total [as Cr]	30-day average	≤ .2 mg/L	all year	002
Chromium, total [as Cr]	daily maximum	≤ .2 mg/L	all year	002
Zinc, total [as Zn]	30-day average	≤ 1 mg/L	all year	002
Zinc, total [as Zn]	daily maximum	≤ 1 mg/L	all year	002
Chlorine, free available	30-day average	≤ .2 mg/L	all year	002
Chlorine, free available	daily maximum	≤ .5 mg/L	all year	002
Chlorination duration	daily maximum	≤ 2 hr/d	all year	002
Solids, total suspended	30-day average	≤ 30 mg/L	all year	003
Solids, total suspended	daily maximum	≤ 100 mg/L	all year	003
Oil & Grease	30-day average	≤ 15 mg/L	all year	003
Oil & Grease	daily maximum	≤ 20 mg/L	all year	003
Solids, total suspended	30-day average	≤ 30 mg/L	all year	004
Solids, total suspended	daily maximum	≤ 100 mg/L	all year	004
Oil & Grease	30-day average	≤ 15 mg/L	all year	004
Oil & Grease	daily maximum	≤ 20 mg/L	all year	004
Solids, total suspended	30-day average	≤ 30 mg/L	all year	005
Solids, total suspended	daily maximum	≤ 100 mg/L	all year	005
Oil & Grease	30-day average	≤ 15 mg/L	all year	005
Oil & Grease	daily maximum	≤ 20 mg/L	all year	005
pH	daily minimum	≥ 6 SU	all year	006
pH	daily maximum	≤ 9 SU	all year	006
Solids, total suspended	daily maximum	≤ 50 mg/L	all year	006

New limits from May 1, 2027

Parameter	New limit	New or tighter	Median, last 12 months	× new limit
Aluminum, total [as Al], 30-day average	0.89 mg/L	new	—	—
Aluminum, total [as Al], daily maximum	2.5 mg/L	new	—	—
Iron, total [as Fe], 30-day average	1 mg/L	new	—	—
Iron, total [as Fe], daily maximum	1 mg/L	new	—	—

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/IA0002534 · MCP: https://passage-data.com/mcp