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Public water system record

Chesterfield

Serves Chesterfield, Macoupin County, IL · 170 people served

Federal records show 3 health-based violations and 2 monitoring/reporting issues for Chesterfield in the last ten years. The most serious issue in this window was a Interim Enhanced Surface Water Treatment Rule violation that EPA lists as archived, not resolved.

  • IL1170200
  • CHESTERFIELD
  • IL
  • 170 served

System profile

Source water Purchased surface water
ZIP 62630
EPA system ID IL1170200

Verify this system on EPA ECHO →

Health-based violations, last 10 years
3
Resolved
0
Unresolved
0
Archived by EPA
3
Any acute record
Yes
Monitoring issues, last 10 years
2

Key facts

  • Chesterfield buys its water from Central Macoupin County RWD.
  • Most recent formal enforcement: signed compliance agreement by Illinois, April 2006.
  • Record on file since 1977, with 7 health-based violations before October 19, 2016.

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Health-based violations

Since October 2016

Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.

Contaminant Rule family Start date Status Acute
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
 120 Dec 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 Yes
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
 120 Nov 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 Yes
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
 120 Oct 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 Yes

Monitoring and reporting issues

Since October 2016

Missed tests or reports, not contaminants found above a limit.

Issue Start date Status
Revised Total Coliform Rule
Monitoring violation
 Feb 1, 2019 Resolved
Chlorine
Monitoring and reporting
 Jan 1, 2019 Resolved

Full record since 1977

EPA's records for Chesterfield go back to 1977. Before October 19, 2016 they list 7 health-based violations (7 resolved) and 13 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1970s 0 1
1990s 0 1
2000s 0 2
2010 to October 18, 2016 7 9
October 19, 2016 to 2019 0 2
2020s 3 0

Most recent health-based violation before October 19, 2016: Interim Enhanced Surface Water Treatment Rule (acute), began August 2015, Resolved.

Show all 7 health-based violations before October 19, 2016
Contaminant Start date Status
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
 Aug 1, 2015 Resolved
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
 Jul 1, 2015 Resolved
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
 May 1, 2015 Resolved
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
 May 1, 2015 Resolved
Total Coliform
Contaminant limit exceeded
 Mar 1, 2015 Resolved
Chlorite
Contaminant limit exceeded
Measured 1.2 mg/L, federal limit 1 mg/L (1.2 times the limit)
 Apr 1, 2014 Resolved
Chlorine dioxide
Disinfectant residual limit exceeded
Measured 0.93 mg/L, federal limit 0.8 mg/L (1.2 times the limit)
 Jun 1, 2011 Resolved

Enforcement actions

Illinois regulators took 1 formal enforcement action against Chesterfield in 2006. The most recent was a signed compliance agreement in April 2006.

Date By Action Violations covered
Apr 10, 2006 Illinois Signed compliance agreement 1 violation: Lead and Copper Rule

What the violations mean

Interim Enhanced Surface Water Treatment Rule

3 incidents

The system did not meet a filtration or treatment requirement for surface water

Inadequate treatment of surface water can let pathogens such as Cryptosporidium and Giardia through

Where the water comes from

Chesterfield buys its water from Central Macoupin County RWD. It lists no wells or intakes of its own.

Buys water from

Annual water quality report

Chesterfield must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.

Systems serving 500 or fewer people may meet the rule by telling customers the report is available on request, so you may need to ask Chesterfield for a copy.

Find a posted report with EPA's Consumer Confidence Report search

Testing your own water

To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Illinois.

Certified drinking water labs by state EPA guidance for private wells