Public water system record
Cal-Water Service Co.-Oroville
Serves Oroville, Butte County, CA · 11,106 people served
Federal records show no health-based violations and 1 monitoring/reporting issue for Cal-Water Service Co.-Oroville 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
- 1
Key facts
- Cal-Water Service Co.-Oroville draws water from 3 wells and 1 surface water intake (2 of them for emergency, seasonal or other part-time use).
- Record on file since 1996, with 1 health-based violation before October 19, 2016.
- Lead pipe inventory: 0 lead and 3,879 unknown out of 4,108 service lines.
Check whether Cal-Water Service Co.-Oroville 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.
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Revised Total Coliform Rule
Monitoring violation
|
Jan 1, 2022 | Resolved |
Full record since 1996
EPA's records for Cal-Water Service Co.-Oroville go back to 1996. Before October 19, 2016 they list 1 health-based violation (1 resolved) and no monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 1 | 0 |
| 2020s | 0 | 1 |
Most recent health-based violation before October 19, 2016: Total Coliform, began June 1996, Resolved.
Show the health-based violation before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Jun 1, 1996 | Resolved |
Where the water comes from
Cal-Water Service Co.-Oroville draws water from 3 wells and 1 surface water intake (2 of them for emergency, seasonal or other part-time use).
Annual water quality report
Cal-Water Service Co.-Oroville 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