Public water system record
City of Modesto
Serves Modesto, West Modesto, Empire and 5 more places, Stanislaus County, CA · 218,771 people served
Federal records show no health-based violations and no monitoring or reporting issues for City of Modesto in the last ten years.
System profile
- Health-based violations, last 10 years
- 0
- Resolved
- 0
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 0
Key facts
- City of Modesto draws water from 60 wells.
- Most recent formal enforcement: compliance order (no penalty) by California, September 2013.
- Record on file since 1992, with 12 health-based violations before October 19, 2016.
Check whether City of 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.
None since October 2016, and no monitoring or reporting violations either.
Full record since 1992
EPA's records for City of Modesto go back to 1992. Before October 19, 2016 they list 12 health-based violations (12 resolved) and 2 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 10 | 1 |
| 2000s | 1 | 1 |
| 2010 to October 18, 2016 | 1 | 0 |
Most recent health-based violation before October 19, 2016: Nitrate (acute), began August 2013, Resolved.
Show all 12 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Nitrate (acute)
Contaminant limit exceeded
|
Aug 1, 2013 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
|
Mar 1, 2007 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Feb 1, 1996 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 1995 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
May 1, 1995 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Oct 1, 1994 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 1994 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 1994 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
|
Nov 1, 1993 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 1993 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jun 1, 1993 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Nov 1, 1992 | Resolved |
Enforcement actions
California regulators took 6 formal enforcement actions against City of Modesto between 1994 and 2013. The most recent was a compliance order (no penalty) in September 2013.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Sep 9, 2013 | California | Compliance order (no penalty) | 1 violation (1 health-based): Nitrate |
| Mar 23, 2007 | California | Compliance order (no penalty) | 1 violation (1 health-based): Nitrate |
| Mar 14, 1996 | California | Compliance order (no penalty) | 1 violation (1 health-based): Total Coliform |
| Oct 31, 1995 | California | Compliance order (no penalty) | 1 violation (1 health-based): Total Coliform |
| Jun 15, 1995 | California | Compliance order (no penalty) | 1 violation (1 health-based): Total Coliform |
| Nov 21, 1994 | California | Compliance order (no penalty) | 1 violation (1 health-based): Total Coliform |
Where the water comes from
City of Modesto draws water from 60 wells. It also buys water from Modesto Irrigation District. 1 other community water system buys water from City of Modesto.
Buys water from
- Modesto Irrigation District Modesto, CA
Community systems that buy water from it
- City of Modesto - Salida Modesto, CA
Annual water quality report
City of 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 10,000 or more people must mail or deliver the report to every customer, and from 2027 they must send it twice a year.
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 California.
Certified drinking water labs by state EPA guidance for private wells