Public water system record
Modesto
Serves Modesto, Macoupin County, IL · 182 people served
Federal records show 6 health-based violations and 2 monitoring/reporting issues for Modesto in the last ten years. The most serious issue in this window was a resolved CARBON, TOTAL violation.
System profile
- Health-based violations, last 10 years
- 6
- Resolved
- 6
- Unresolved
- 0
- Any acute record
- Yes
- Monitoring issues, last 10 years
- 2
Key facts
- Modesto buys its water from Palmyra-Modesto Water Commission.
- Record on file since 1993, with 8 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 97 service lines.
Check whether Modesto serves your address
Health-based violations
Since October 2016Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.
| Contaminant | Rule family | Start date | Status | Acute |
|---|---|---|---|---|
|
CARBON, TOTAL
Treatment technique failure
|
210 | Apr 1, 2025 | Resolved | No |
|
CARBON, TOTAL
Treatment technique failure
|
210 | Jan 1, 2025 | Resolved | No |
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Oct 1, 2021 | Resolved | Yes |
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Oct 1, 2021 | Resolved | Yes |
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Sep 1, 2021 | Resolved | Yes |
|
CARBON, TOTAL
Treatment technique failure
|
210 | Apr 1, 2017 | Resolved | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Public Notice
OTHER
|
May 30, 2025 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2023 | Resolved |
Full record since 1993
EPA's records for Modesto go back to 1993. Before October 19, 2016 they list 8 health-based violations (7 resolved, 1 archived by EPA without a recorded fix) and 3 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 7 | 2 |
| 2000s | 1 | 1 |
| October 19, 2016 to 2019 | 1 | 0 |
| 2020s | 5 | 2 |
Most recent health-based violation before October 19, 2016: Total Coliform, began August 2009, Resolved.
Show all 8 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 2009 | Resolved |
|
Atrazine
Contaminant limit exceeded
|
Jul 1, 1995 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Apr 1, 1995 | Archived |
|
Atrazine
Contaminant limit exceeded
|
Apr 1, 1995 | Resolved |
|
Atrazine
Contaminant limit exceeded
|
Jan 1, 1995 | Resolved |
|
Atrazine
Contaminant limit exceeded
|
Oct 1, 1994 | Resolved |
|
Atrazine
Contaminant limit exceeded
|
Jan 1, 1994 | Resolved |
|
Atrazine
Contaminant limit exceeded
|
Oct 1, 1993 | Resolved |
What the violations mean
CARBON, TOTAL
3 incidentsThe system did not complete a treatment step or action that federal rules require for CARBON, TOTAL (a treatment technique violation).
The utility had to notify customers about each of these violations.
Interim Enhanced Surface Water Treatment Rule
3 incidentsThe 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
Modesto buys its water from Palmyra-Modesto Water Commission. It lists no wells or intakes of its own.
Buys water from
- Palmyra-Modesto Water Commission Modesto, IL
Annual water quality report
Modesto 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 Modesto 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