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Public water system record

Dwight

Serves Dwight, Livingston County, IL · 4,400 people served

Federal records show 1 health-based violation and 2 monitoring/reporting issues for Dwight in the last ten years. The most serious issue in this window was a resolved Arsenic violation.

  • IL1050250
  • DWIGHT
  • IL
  • 4,400 served

System profile

Source water Groundwater
ZIP 60420
EPA system ID IL1050250

Verify this system on EPA ECHO →

Health-based violations, last 10 years
1
Resolved
1
Unresolved
0
Any acute record
No
Monitoring issues, last 10 years
2

Key facts

  • Dwight draws water from 4 wells (1 of them for emergency, seasonal or other part-time use).
  • Highest measured level in the last 10 years: Arsenic, 12.6 µg/L, federal limit 10 µg/L (1.3 times the limit), 2023.
  • Most recent formal enforcement: compliance order (no penalty) by Illinois, December 2023.
  • Record on file since 1977, with 3 health-based violations before October 19, 2016.
  • Lead pipe inventory: 17 lead and 434 unknown out of 1,696 service lines.

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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
Arsenic
Contaminant limit exceeded
Measured 12.6 µg/L, federal limit 10 µg/L (1.3 times the limit)
 330 Jul 1, 2023 Resolved No

Monitoring and reporting issues

Since October 2016

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

Issue Start date Status
Arsenic
Monitoring and reporting
 Jul 1, 2023 Resolved
Lead and Copper Rule
Monitoring and reporting
 Dec 30, 2020 Resolved

Full record since 1977

EPA's records for Dwight go back to 1977. Before October 19, 2016 they list 3 health-based violations (2 resolved, 1 archived by EPA without a recorded fix) and 4 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1970s 0 1
1990s 3 0
2000s 0 3
2020s 1 2

Most recent health-based violation before October 19, 2016: Lead and Copper Rule, began July 1999, Resolved.

Show all 3 health-based violations before October 19, 2016
Contaminant Start date Status
Lead and Copper Rule
Treatment technique failure
 Jul 1, 1999 Resolved
Total Coliform
Contaminant limit exceeded
 Jul 1, 1994 Archived
Lead and Copper Rule
Treatment technique failure
 Dec 7, 1992 Resolved

Enforcement actions

Illinois regulators took 1 formal enforcement action against Dwight in 2023. The most recent was a compliance order (no penalty) in December 2023.

Date By Action Violations covered
Dec 15, 2023 Illinois Compliance order (no penalty) 2 violations (1 health-based): Arsenic

What the violations mean

Arsenic

1 incident

Arsenic exceeded the federal limit

Long-term arsenic exposure is linked to cancer and cardiovascular effects

Where the water comes from

Dwight draws water from 4 wells (1 of them for emergency, seasonal or other part-time use). 1 other community water system and 2 smaller public systems such as schools, businesses or campgrounds buy water from Dwight.

Community systems that buy water from it

Annual water quality report

Dwight 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.

Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.

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