MyTapWater.us

PWSID IL1170600

MODESTO

Community water system based in Modesto, IL

Service area on file with EPA: Modesto · Macoupin County. EPA's recorded service area can be incomplete for regional authorities. The cities and counties above are what the utility has filed with EPA; the utility may serve additional areas.

Population served
182
Source
Surface water
Status
Active

At a glance

1 finding worth watching

Past 5 years: 25 health-based violations on file, all marked Resolved or Archived. See compliance history below.

Risk classification follows EPA's published values for safe drinking water, with caution and concern bands reviewed by a clinician. Past resolved violations do not influence this card. See methodology.

Lead service line inventory

Service line inventory still in progress

Modesto (PWS) reports 0 confirmed lead service lines, 93 non-lead, 4 unknown (total 97) in its Illinois EPA Service Line Material Inventory (reporting year 2022). EPA's Lead and Copper Rule Revisions treat unknown and galvanized-requiring-replacement lines as lead for notification and replacement scheduling until verified.

  • 0 confirmed lead service lines
  • 0 galvanized requiring replacement (LCRI treats these as lead)
  • 4 unknown (4.1% of total)
  • 93 confirmed non-lead (95.9%)
  • 97 total service lines in the system
What to do if your service line might be lead
  1. Ask your utility to check the service-line classification for your specific address. Many utilities provide a public address-lookup tool linked from the inventory page.
  2. Get on the replacement queue. Under the LCRI, utilities must replace all lead and galvanized-requiring- replacement lines within 10 years (clock generally starts November 2027). Some prioritize requests.
  3. Until the line is replaced: flush the tap 30 seconds after long stagnation, use cold water for drinking and cooking, and consider an NSF/ANSI 53 lead-rated tap filter.
  4. Talk to your clinician about a blood lead test for anyone in the home, especially a pregnant person or a child under 6. Lead in drinking water guide.

Inventory data sourced from Modesto (PWS) (reporting date April 14, 2023; retrieved May 24, 2026 ; curator confidence: high ). Confirmed against the original source automatically each month; see methodology.

Lead and copper test results

The most recent measurement per contaminant from EPA's Lead and Copper Rule sampling.

Why only lead and copper, and not arsenic, nitrate, or others?

EPA's bulk SDWIS download is the only nationwide per-system sample data they publish, and it only includes the Lead and Copper Rule table. Values for other regulated contaminants (TTHMs, nitrate, arsenic, etc.) appear on this page only when they trigger a violation. For the full per-system contaminant suite, see the utility's annual Consumer Confidence Report (link further down the page).

Most recent measurements per contaminant (Lead and Copper Rule) . Sorted by risk: concern first, then caution, then unrated, then safe.
Contaminant Most recent Date Risk
Lead
PB90
 0 mg/L December 31, 2025 Below regulatory thresholds

Data from EPA SDWIS (Lead and Copper Rule sample table) , last refreshed May 24, 2026.

Fluoride

Per CDC My Water's Fluoride

MODESTO adds fluoride to its drinking water.

CDC classifies a system as fluoridated when it adjusts fluoride to the recommended level, or when it buys water from a system that does. The U.S. Public Health Service recommends 0.7 mg/L for community water fluoridation.

Source: CDC My Water's Fluoride, listed under MODESTO (Macoupin County). Verify on CDC's site .

Area context

Macoupin County, IL (2020 data)

Community water systems
32 of 32 add fluoride
Population on fluoridated water
40,144 of 40,144 (100.0%)

Illinois statewide (2020 data)

Population on fluoridated water
11,457,094 of 11,640,823 (98.4%)
Community water systems adding fluoride
1,639 of 1,815

Data from CDC My Water's Fluoride (per-system status) , last refreshed May 19, 2026.

Data from CDC Water Fluoridation Reporting System (state and county aggregates) , last refreshed May 16, 2026.

Recorded contaminant measurements (from violations)

When this system exceeded a regulatory limit and EPA recorded the measured value, that value is shown here. These are not routine sample results: they are the values the violation was triggered on.

Measured values from recorded violations . Most recent first.
Period Contaminant Measured Federal MCL Status
April 1, 2025Carbon, Total0.98RATIO— Health-based
April 1, 2025Carbon, Total0.98RATIO— Health-based
April 1, 2025Carbon, Total0.98RATIO— Health-based
April 1, 2025Carbon, Total0.98RATIO— Health-based
April 1, 2025Carbon, Total0.98RATIO— Health-based
January 1, 2025Carbon, Total0.84RATIO— Health-based
January 1, 2025Carbon, Total0.84RATIO— Health-based
January 1, 2025Carbon, Total0.84RATIO— Health-based
January 1, 2025Carbon, Total0.84RATIO— Health-based
January 1, 2025Carbon, Total0.84RATIO— Health-based

Data from EPA SDWIS (violation records) , last refreshed May 24, 2026.

Compliance history

EPA-recorded violations against this system over the last 5 years.

How to read this section

Health-based violations are when a measured limit was exceeded; the measured concentration is shown alongside the EPA federal limit where SDWIS published it. Monitoring and reporting items are paperwork issues (missed sample dates, late filings) that do not themselves indicate unsafe water.

25 resolved health-based violations in the last 5 years

All 25 health-based violations in the last 5 years are marked Resolved or Archived. Past violations do not represent current water quality.

Health-based violations in the last 5 years
Period start Contaminant What happened Measured level Status
April 1, 2025 Carbon, Total Treatment Technique Precursor Removal
0.980 RATIO
 Resolved
April 1, 2025 Carbon, Total Treatment Technique Precursor Removal
0.980 RATIO
 Resolved
April 1, 2025 Carbon, Total Treatment Technique Precursor Removal
0.980 RATIO
 Resolved
April 1, 2025 Carbon, Total Treatment Technique Precursor Removal
0.980 RATIO
 Resolved
April 1, 2025 Carbon, Total Treatment Technique Precursor Removal
0.980 RATIO
 Resolved
January 1, 2025 Carbon, Total Treatment Technique Precursor Removal
0.840 RATIO
 Resolved
January 1, 2025 Carbon, Total Treatment Technique Precursor Removal
0.840 RATIO
 Resolved
January 1, 2025 Carbon, Total Treatment Technique Precursor Removal
0.840 RATIO
 Resolved
January 1, 2025 Carbon, Total Treatment Technique Precursor Removal
0.840 RATIO
 Resolved
January 1, 2025 Carbon, Total Treatment Technique Precursor Removal
0.840 RATIO
 Resolved
October 1, 2021 Interim Enhanced Surface Water Treatment Rule Single Turbidity Exceed (Enhanced SWTR) Not reported Resolved
October 1, 2021 Interim Enhanced Surface Water Treatment Rule Single Turbidity Exceed (Enhanced SWTR) Not reported Resolved
October 1, 2021 Interim Enhanced Surface Water Treatment Rule Single Turbidity Exceed (Enhanced SWTR) Not reported Resolved
October 1, 2021 Interim Enhanced Surface Water Treatment Rule Single Turbidity Exceed (Enhanced SWTR) Not reported Resolved
October 1, 2021 Interim Enhanced Surface Water Treatment Rule Monthly Turbidity Exceed (Enhanced SWTR) Not reported Resolved
October 1, 2021 Interim Enhanced Surface Water Treatment Rule Monthly Turbidity Exceed (Enhanced SWTR) Not reported Resolved
October 1, 2021 Interim Enhanced Surface Water Treatment Rule Monthly Turbidity Exceed (Enhanced SWTR) Not reported Resolved
October 1, 2021 Interim Enhanced Surface Water Treatment Rule Monthly Turbidity Exceed (Enhanced SWTR) Not reported Resolved
October 1, 2021 Interim Enhanced Surface Water Treatment Rule Single Turbidity Exceed (Enhanced SWTR) Not reported Resolved
October 1, 2021 Interim Enhanced Surface Water Treatment Rule Monthly Turbidity Exceed (Enhanced SWTR) Not reported Resolved
September 1, 2021 Interim Enhanced Surface Water Treatment Rule Monthly Turbidity Exceed (Enhanced SWTR) Not reported Resolved
September 1, 2021 Interim Enhanced Surface Water Treatment Rule Monthly Turbidity Exceed (Enhanced SWTR) Not reported Resolved
September 1, 2021 Interim Enhanced Surface Water Treatment Rule Monthly Turbidity Exceed (Enhanced SWTR) Not reported Resolved
September 1, 2021 Interim Enhanced Surface Water Treatment Rule Monthly Turbidity Exceed (Enhanced SWTR) Not reported Resolved
September 1, 2021 Interim Enhanced Surface Water Treatment Rule Monthly Turbidity Exceed (Enhanced SWTR) Not reported Resolved
4 monitoring and reporting item s (paperwork) · these are not health risks
Monitoring and reporting items in the last 5 years
Period start Relates to Item Status
May 30, 2025 Public Notice Public Notification Violation for NPDWR Violation Resolved
May 30, 2025 Public Notice Public Notification Violation for NPDWR Violation Resolved
July 1, 2023 Consumer Confidence Rule Consumer Confidence Report Complete Failure to Report Resolved
July 1, 2023 Consumer Confidence Rule Consumer Confidence Report Complete Failure to Report Resolved
5 older violation s (5-10 years ago) · 5 health-based, 0 paperwork , all resolved
Violations 5-10 years ago (5 total)
Period start Relates to Item Measured level Status
April 1, 2017 Carbon, Total Treatment Technique Precursor Removal — Resolved
April 1, 2017 Carbon, Total Treatment Technique Precursor Removal — Resolved
April 1, 2017 Carbon, Total Treatment Technique Precursor Removal — Resolved
April 1, 2017 Carbon, Total Treatment Technique Precursor Removal — Resolved
April 1, 2017 Carbon, Total Treatment Technique Precursor Removal — Resolved

Data from EPA SDWIS (violation records) , last refreshed May 24, 2026.

Where to see every contaminant this utility tested for

EPA's bulk SDWIS dataset gives MyTapWater.us per-system measured values for lead and copper, plus violation records for everything else. To see every regulated contaminant this utility tested for in the past year (TTHMs, HAA5, nitrate, arsenic, fluoride, chromium, etc.) with measured values, read the utility's Consumer Confidence Report (CCR).

Every community water system is required by EPA to publish a CCR annually, by July 1, listing every contaminant they sampled, the measured value, the federal limit, and any health-based exceedances. Most utilities post the report online; some mail it with your bill.

How to find MODESTO's CCR:

Other water systems in Macoupin County, IL

Compare nearby utilities by population served.

Contact this utility

Public administrative contact information for this water system, as filed with the EPA. Use this to ask about your service line, request your home's lead status, or report a water quality issue.

Administrator
THOMPSON, TOM M.
Phone
217-414-0048
Mailing address
VILLAGE HALL
109 S. PEARL, PO BOX 14
MODESTO, IL 62667

Where this page's data comes from

Bundle released 2026-Q2, regenerated May 24, 2026. Each section above also shows its own source date so you can tell at a glance how fresh that part of the page is.

Every value on this page is cross-verified before publication; read our methodology for the verification steps and corrections process.