MODESTO, CA · Stanislaus County
CITY OF MODESTO - GRAYSON Water System
Consumer Confidence Report status
CITY OF MODESTO - GRAYSON must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.
As of August 1, 2026, EPA's federal records show no open violations for CITY OF MODESTO - GRAYSON.
Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace California’s official records. Always confirm current status with California before making decisions based on this information.
System facts
- System ID (PWSID)
- CA5010033
- System type
- Community Water System
- Population served
- 914
- Service connections
- 278
- Ownership
- local government
- Water source
- groundwater (wells)
CITY OF MODESTO - GRAYSON is one of 728 community water systems in California in the 501 to 3,300 people size category, serving 914 people from groundwater.
As of August 1, 2026, its federal record holds 2 entries between 1998 and 2003, all of which EPA lists as closed. Nothing has been added since 2003.
None of the 2 are monitoring or reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset; these involve water-quality, treatment, or public-notice findings instead. The record involves inorganic chemicals.
Violation history
Maximum Contaminant Level Violation, Single Sample
Health-basedNitrate
June 1, 2003 – June 30, 2003
ResolvedMaximum Contaminant Level Violation, Single Sample
Health-basedNitrate
December 1, 1998 – December 31, 1998
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| June 1, 2003 – June 30, 2003 | Maximum Contaminant Level Violation, Single Sample | Nitrate | Health-based | Resolved |
| December 1, 1998 – December 31, 1998 | Maximum Contaminant Level Violation, Single Sample | Nitrate | Health-based | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
- July 11, 2003State Compliance achieved2 linked violations
- July 10, 2003State Compliance achieved1 linked violation
Common questions
Is CITY OF MODESTO - GRAYSON required to publish a Consumer Confidence Report?
- Yes. CITY OF MODESTO - GRAYSON is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.
When is CITY OF MODESTO - GRAYSON’s next Consumer Confidence Report due?
- CITY OF MODESTO - GRAYSON’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does CITY OF MODESTO - GRAYSON have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for CITY OF MODESTO - GRAYSON.
What is a Consumer Confidence Report?
- A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.
Contact
MARTINEZ, MANUEL
209-342-4592
MODESTO, CA 95355