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Public water system record

Tonica

Serves Tonica, LaSalle County, IL · 705 people served

Federal records show no health-based violations and no monitoring or reporting issues for Tonica in the last ten years.

  • IL0991150
  • TONICA
  • IL
  • 705 served

System profile

Source water Groundwater
ZIP 61370
EPA system ID IL0991150

Verify this system on EPA ECHO →

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

Key facts

  • Tonica draws water from 2 wells.
  • Most recent formal enforcement: signed compliance agreement by Illinois, January 2007.
  • Record on file since 1977, with 16 health-based violations before October 19, 2016.
  • Lead pipe inventory: 1 lead and 0 unknown out of 336 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.

None since October 2016, and no monitoring or reporting violations either.

Full record since 1977

EPA's records for Tonica go back to 1977. Before October 19, 2016 they list 16 health-based violations (14 resolved, 2 archived by EPA without a recorded fix) and 13 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1970s 0 1
1990s 2 3
2000s 13 6
2010 to October 18, 2016 1 3

Most recent health-based violation before October 19, 2016: Nitrite (acute), began January 2011, Resolved.

Show all 16 health-based violations before October 19, 2016
Contaminant Start date Status
Nitrite (acute)
Contaminant limit exceeded
Measured 2 mg/L, federal limit 1 mg/L (2 times the limit)
 Jan 1, 2011 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.012 mg/L, federal limit 0.01 mg/L (1.2 times the limit)
 Jul 1, 2009 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.015 mg/L, federal limit 0.01 mg/L (1.5 times the limit)
 Apr 1, 2009 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.021 mg/L, federal limit 0.01 mg/L (2.1 times the limit)
 Jan 1, 2009 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.025 mg/L, federal limit 0.01 mg/L (2.5 times the limit)
 Oct 1, 2008 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.025 mg/L, federal limit 0.01 mg/L (2.5 times the limit)
 Jul 1, 2008 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.026 mg/L, federal limit 0.01 mg/L (2.6 times the limit)
 Apr 1, 2008 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.026 mg/L, federal limit 0.01 mg/L (2.6 times the limit)
 Jan 1, 2008 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.026 mg/L, federal limit 0.01 mg/L (2.6 times the limit)
 Oct 1, 2007 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.024 mg/L, federal limit 0.01 mg/L (2.4 times the limit)
 Jul 1, 2007 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.027 mg/L, federal limit 0.01 mg/L (2.7 times the limit)
 Apr 1, 2007 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.028 mg/L, federal limit 0.01 mg/L (2.8 times the limit)
 Jan 1, 2007 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.031 mg/L, federal limit 0.01 mg/L (3.1 times the limit)
 Oct 1, 2006 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.031 mg/L, federal limit 0.01 mg/L (3.1 times the limit)
 Jul 1, 2006 Resolved
Total Coliform
Contaminant limit exceeded
 Oct 1, 1997 Archived
Total Coliform
Contaminant limit exceeded
 Sep 1, 1997 Archived

Enforcement actions

Illinois regulators took 1 formal enforcement action against Tonica in 2007. The most recent was a signed compliance agreement in January 2007.

Date By Action Violations covered
Jan 10, 2007 Illinois Signed compliance agreement 13 violations (13 health-based): Arsenic

Where the water comes from

Tonica draws water from 2 wells.

Annual water quality report

Tonica 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