ILLINOIS AMERICAN WATER COMPANY

Address

12W780 DAVEY RD
LEMONT, IL 60439
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County

DU PAGE County

Inspections

1 · last Nov 27, 2023

Total Penalties

$0

Registry ID

110007557161

Compliance Status (Last 12 Quarters)

Number of calendar quarters, out of the last 12, in which this facility was in violation of its permit. Zero means no recorded violations in that program over the past three years.

2

Water (CWA)
Qtrs Non-Compliant

0

Hazardous Waste (RCRA)
Qtrs Non-Compliant

Compliance Violations

Individual permit violations recorded by the EPA across air, water, and hazardous waste programs. Open violations are unresolved as of the most recent ECHO data update.

Program	Type	Violation Date	Return to Compliance	Status
cwa	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	Dec 23, 2025	—	Open
cwa	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	Nov 30, 2025	—	Open
cwa	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	Nov 21, 2025	—	Open
cwa	Schedule Event unachieved and not reported	Oct 31, 2025	Dec 23, 2025	Resolved
cwa	Schedule Event reported late	Oct 31, 2025	—	Open
cwa	Schedule Event unachieved but reported	Oct 31, 2025	Dec 23, 2025	Resolved
cwa	Schedule Event achieved late but reported	Oct 31, 2025	—	Open
cwa	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	Oct 21, 2025	—	Open
cwa	Schedule Event reported late	Jul 31, 2025	—	Open
cwa	Schedule Event unachieved but reported	Jul 31, 2025	Sep 4, 2025	Resolved
cwa	Schedule Event achieved late but reported	Jul 31, 2025	—	Open
cwa	Schedule Event unachieved and not reported	Jul 31, 2025	Sep 4, 2025	Resolved
cwa	Schedule Event unachieved but reported	Apr 30, 2025	Jun 17, 2025	Resolved
cwa	Schedule Event unachieved and not reported	Apr 30, 2025	Jun 17, 2025	Resolved
cwa	Schedule Event reported late	Apr 30, 2025	—	Open
cwa	Schedule Event achieved late but reported	Apr 30, 2025	—	Open
cwa	WW SSO - Discharge to Waters	Dec 25, 2023	Jan 25, 2024	Resolved
cwa	WW SSO - Improper Operation and Maintenance	Dec 25, 2023	Jan 25, 2024	Resolved
cwa	Schedule Event achieved late but reported	Jul 31, 2023	—	Open
cwa	Schedule Event achieved late but reported	Jan 31, 2022	—	Open
cwa	Schedule Event unachieved but reported	Nov 30, 2021	Aug 16, 2022	Resolved
cwa	Schedule Event achieved late but reported	Nov 30, 2021	—	Open
cwa	Schedule Event unachieved and not reported	Nov 30, 2021	Aug 16, 2022	Resolved
cwa	Schedule Event reported late	Nov 30, 2021	—	Open
cwa	Schedule Event achieved late but reported	Jul 31, 2021	—	Open
cwa	Schedule Event achieved late but reported	Mar 31, 2018	—	Open
cwa	Schedule Event achieved late but reported	Jan 31, 2018	—	Open
cwa	Schedule Event achieved late but reported	Jul 31, 2017	—	Open
cwa	Schedule Event achieved late but reported	Jul 31, 2017	—	Open
cwa	Schedule Event achieved late but reported	Jul 31, 2016	—	Open
cwa	Schedule Event achieved late but reported	Jul 31, 2016	—	Open
cwa	Schedule Event achieved late but reported	Jul 31, 2016	—	Open
cwa	Schedule Event reported late	Jan 31, 2016	—	Open
cwa	Schedule Event unachieved but reported	Jan 31, 2016	Jun 16, 2016	Resolved
cwa	Schedule Event unachieved and not reported	Jan 31, 2016	Jun 16, 2016	Resolved
cwa	Schedule Event achieved late but reported	Jan 31, 2016	—	Open
cwa	WW SSO - Improper Operation and Maintenance	Oct 23, 2012	—	Open
cwa	WW SSO - Overflow to Dry Land or Building Backup	Oct 23, 2012	—	Open
cwa	Schedule Event achieved late but reported	Jan 31, 2012	—	Open
cwa	Schedule Event achieved late but reported	Jun 30, 2011	—	Open
cwa	Schedule Event reported late	Jun 30, 2011	—	Open
cwa	Schedule Event achieved late but reported	Jan 31, 2011	—	Open
cwa	Schedule Event unachieved but reported	Dec 31, 2010	Mar 4, 2013	Resolved
cwa	Schedule Event achieved late but reported	Dec 31, 2010	—	Open
cwa	Schedule Event reported late	Dec 31, 2010	—	Open
cwa	Schedule Event unachieved and not reported	Dec 31, 2010	Mar 4, 2013	Resolved
cwa	Schedule Event achieved late but reported	Jul 31, 2010	—	Open
cwa	Schedule Event achieved late but reported	Jan 31, 2010	—	Open
cwa	Schedule Event achieved late but reported	Jul 31, 2009	—	Open
cwa	Schedule Event achieved late but reported	Jan 31, 2009	—	Open

Discharge Limit Exceedances

Instances where this facility's reported discharge monitoring results exceeded its permitted limits under the Clean Water Act. Exceedance percentage shows how far over the permit limit the discharge was.

Pollutant	Violation	Reported	Limit	Exceedance	Period	Status
Nitrogen, ammonia total [as N]	DMR, Limited - Numeric Violation	9.92 mg/L	8.30	+20%	Apr 2023	Open
Nitrogen, ammonia total [as N]	DMR, Limited - Numeric Violation	9.10 mg/L	8.30	+10%	Apr 2022	Open
Phosphorus, total [as P]	DMR, Limited - Numeric Violation	1.90 mg/L	1.00	+90%	Sep 2021	Open
Oxygen, dissolved [DO]	DMR, Limited - Numeric Violation	5.92 mg/L	6.00	+1%	Jul 2020	Open
Coliform, fecal general	DMR, Limited - Numeric Violation	600.00 MPN/100mL	200.00	+200%	Jun 2019	Open

Enforcement Actions

Formal enforcement cases brought by the EPA or state agencies, including administrative orders and civil penalties assessed. Penalty amounts reflect what was formally assessed, not necessarily what was collected.

State Administrative Order of Consent

Clean Water Act · Case IL-0032760_1 · May 16, 2024

State Administrative Order of Consent

Clean Water Act · Case IL-0032760 · Jan 29, 2014

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