Public water system record
Cal-Water Service Co.-Chico
Serves Chico and Durham, Butte County, CA · 114,925 people served
Federal records show no health-based violations and no monitoring or reporting issues for Cal-Water Service Co.-Chico 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
- Cal-Water Service Co.-Chico draws water from 54 wells (2 of them for emergency, seasonal or other part-time use).
- Record on file since 1992, with 5 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 19,384 unknown out of 31,115 service lines.
Check whether Cal-Water Service Co.-Chico 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 Cal-Water Service Co.-Chico go back to 1992. Before October 19, 2016 they list 5 health-based violations (5 resolved) and no monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 4 | 0 |
| 2000s | 1 | 0 |
Most recent health-based violation before October 19, 2016: Total Coliform, began September 2002, Resolved.
Show all 5 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 2002 | Resolved |
|
Tetrachloroethylene
Contaminant limit exceeded
Measured 0.032 mg/L, federal limit 0.005 mg/L (6.4 times the limit)
|
Dec 1, 1998 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Nov 1, 1992 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Oct 1, 1992 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 1992 | Resolved |
Where the water comes from
Cal-Water Service Co.-Chico draws water from 54 wells (2 of them for emergency, seasonal or other part-time use).
Annual water quality report
Cal-Water Service Co.-Chico 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