Public water system record
Contra Costa Water District
Serves Concord, Antioch, Pittsburg and 14 more places, Contra Costa County, CA · 198,000 people served
Federal records show no health-based violations and no monitoring or reporting issues for Contra Costa Water District 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
- Contra Costa Water District draws water from 5 surface water intakes and 5 reservoirs.
- Most recent formal enforcement: compliance order (no penalty) by California, June 1997.
- Record on file since 1989, with 1 health-based violation before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 60,823 service lines.
Check whether Contra Costa Water District 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 1989
EPA's records for Contra Costa Water District go back to 1989. Before October 19, 2016 they list 1 health-based violation (1 resolved) and 1 monitoring or reporting violation.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 0 | 1 |
| 1990s | 1 | 0 |
Most recent health-based violation before October 19, 2016: Surface Water Treatment Rule, began February 1999, Resolved.
Show the health-based violation before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Surface Water Treatment Rule
Treatment technique failure
|
Feb 1, 1999 | Resolved |
Enforcement actions
California regulators took 1 formal enforcement action against Contra Costa Water District in 1997. The most recent was a compliance order (no penalty) in June 1997.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Jun 13, 1997 | California | Compliance order (no penalty) | 1 violation (1 health-based): Surface Water Treatment Rule |
Where the water comes from
Contra Costa Water District draws water from 5 surface water intakes and 5 reservoirs. It also buys water from Randall-Bold Water Treatment Plant and East Bay MUD. 7 other community water systems buy water from Contra Costa Water District. 1 other public water system has an emergency connection to Contra Costa Water District.
Buys water from
- Randall-Bold Water Treatment Plant Concord, CA
- East Bay MUD Oakland, CA
Community systems that buy water from it
- CCWD/Brentwood WTP Concord, CA
- City of Antioch Antioch, CA
- City of Martinez Martinez, CA
- City of Pittsburg Pittsburg, CA
- Clayton Palms Water Clayton, CA
- Golden State Water Company - Bay Point Rancho Cordova, CA
- Randall-Bold Water Treatment Plant Concord, CA
Annual water quality report
Contra Costa Water District 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