City of Cedar Rapids — NPDES permit IA0082236: limits, due date and EPA's record

Airports, Flying Fields, & Services, Cedar Rapids, Iowa. NPDES permit IA0082236 expired May 31, 2024; its limits still apply. Last 12 months: over a limit 5 times (last August 2026), 14 required values missing. Source: EPA ECHO, Oct 22, 2026.

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

Period ending	Outfall	Parameter	Reported	Limit	Over by
May 2026	003	Oxygen, dissolved [DO], daily minimum	1.48	≥ 6.5 mg/L	77%
August 2026	002	Oxygen, dissolved [DO], daily minimum	3.54	≥ 5 mg/L	29%
August 2026	003	Oxygen, dissolved [DO], daily minimum	3.73	≥ 6.5 mg/L	43%
August 2026	004	Oxygen, dissolved [DO], daily minimum	3.18	≥ 5 mg/L	36%
August 2026	010	Oxygen, dissolved [DO], daily minimum	2.08	≥ 5 mg/L	58%

Limits in force (55)

Parameter	Statistic	Limit	Months	Outfall
pH	daily minimum	≥ 6.5 SU	all year	001
pH	daily maximum	≤ 9 SU	all year	001
Oil & Grease	30-day average	≤ 10 mg/L	all year	001
Oil & Grease	daily maximum	≤ 15 mg/L	all year	001
Propylene glycol, total	30-day average	≤ 98 mg/L	all year	001
Propylene glycol, total	daily maximum	≤ 174 mg/L	all year	001
Ethylene glycol	30-day average	≤ 186 mg/L	all year	001
Ethylene glycol	daily maximum	≤ 186 mg/L	all year	001
BOD, carbonaceous [5 day, 20 C]	30-day average	≤ 40 mg/L	all year	001
BOD, carbonaceous [5 day, 20 C]	daily maximum	≤ 40 mg/L	all year	001
Oxygen, dissolved [DO]	daily minimum	≥ 5 mg/L	all year	002
pH	daily minimum	≥ 6.5 SU	all year	002
pH	daily maximum	≤ 9 SU	all year	002
Oil & Grease	30-day average	≤ 10 mg/L	all year	002
Oil & Grease	daily maximum	≤ 15 mg/L	all year	002
Propylene glycol, total	30-day average	≤ 101 mg/L	all year	002
Propylene glycol, total	daily maximum	≤ 174 mg/L	all year	002
Ethylene glycol	30-day average	≤ 186 mg/L	all year	002
Ethylene glycol	daily maximum	≤ 186 mg/L	all year	002
BOD, carbonaceous [5 day, 20 C]	30-day average	≤ 84 mg/L	all year	002
BOD, carbonaceous [5 day, 20 C]	daily maximum	≤ 84 mg/L	all year	002
Oxygen, dissolved [DO]	daily minimum	≥ 6.5 mg/L	all year	003
Oxygen, dissolved [DO]	daily maximum	≤ 9 mg/L	all year	003
pH	daily minimum	≥ 6.5 SU	all year	003
pH	daily maximum	≤ 9 SU	all year	003
Oil & Grease	30-day average	≤ 10 mg/L	all year	003
Oil & Grease	daily maximum	≤ 15 mg/L	all year	003
Propylene glycol, total	30-day average	≤ 99 mg/L	all year	003
Propylene glycol, total	daily maximum	≤ 174 mg/L	all year	003
Depth of pond or reservoir in feet	30-day average	report only (ft)	all year	003
Ethylene glycol	30-day average	≤ 186 mg/L	all year	003
Ethylene glycol	daily maximum	≤ 186 mg/L	all year	003
Precipitation volume	30-day average	report only (in/d)	all year	003
Precipitation volume	daily maximum	report only (in/d)	all year	003
BOD, carbonaceous [5 day, 20 C]	30-day average	≤ 75.5 mg/L	all year	003
BOD, carbonaceous [5 day, 20 C]	daily maximum	≤ 75.5 mg/L	all year	003
BOD, carbonaceous [5 day, 20 C]	30-day average	≤ 75.6 lb/d	all year	003
BOD, carbonaceous [5 day, 20 C]	daily maximum	≤ 75.6 lb/d	all year	003
Oxygen, dissolved [DO]	daily minimum	≥ 5 mg/L	all year	004
pH	daily minimum	≥ 6.5 SU	all year	004
pH	daily maximum	≤ 9 SU	all year	004
Oxygen, dissolved [DO]	daily minimum	≥ 5 mg/L	all year	005
pH	daily minimum	≥ 6.5 SU	all year	005
pH	daily maximum	≤ 9 SU	all year	005
Oxygen, dissolved [DO]	daily minimum	≥ 5 mg/L	all year	010
pH	daily minimum	≥ 6.5 SU	all year	010
pH	daily maximum	≤ 9 SU	all year	010
Oil & Grease	30-day average	≤ 10 mg/L	all year	010
Oil & Grease	daily maximum	≤ 15 mg/L	all year	010
Propylene glycol, total	30-day average	≤ 98 mg/L	all year	010
Propylene glycol, total	daily maximum	≤ 174 mg/L	all year	010
Ethylene glycol	30-day average	≤ 186 mg/L	all year	010
Ethylene glycol	daily maximum	≤ 186 mg/L	all year	010
BOD, carbonaceous [5 day, 20 C]	30-day average	≤ 110 mg/L	all year	010
BOD, carbonaceous [5 day, 20 C]	daily maximum	≤ 110 mg/L	all year	010

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/IA0082236 · MCP: https://passage-data.com/mcp