Public water system record
City of Rialto
Serves Rialto, San Bernardino County, CA · 54,453 people served
Federal records show no health-based violations and no monitoring or reporting issues for City of Rialto 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 Rialto draws water from 9 wells (1 of them for emergency, seasonal or other part-time use).
- Record on file since 1993, with 2 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 12,175 service lines.
Check whether City of Rialto 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 1993
EPA's records for City of Rialto go back to 1993. Before October 19, 2016 they list 2 health-based violations (2 resolved) and 1 monitoring or reporting violation.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 2 | 0 |
| 2010 to October 18, 2016 | 0 | 1 |
Most recent health-based violation before October 19, 2016: Total Coliform, began August 1993, Resolved.
Show all 2 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 1993 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 1993 | Resolved |
Where the water comes from
City of Rialto draws water from 9 wells (1 of them for emergency, seasonal or other part-time use). It also buys water from San Bernardino Valley WD and West Valley Water District. It also has emergency connections to San Bernardino City, Riverside Highland Water Company and San Gabriel Valley WC - Fontana. 2 other community water systems buy water from City of Rialto. 2 other public water systems have emergency connections to City of Rialto.
Buys water from
- San Bernardino Valley WD San Bernardino, CA
- West Valley Water District Rialto, CA
Emergency or part-time connections to
- San Bernardino City San Bernardino, CA
- Riverside Highland Water Company Grand Terrace, CA
- San Gabriel Valley WC - Fontana Fontana, CA
Community systems that buy water from it
- City of Colton Colton, CA
- West Valley Water District Rialto, CA
Annual water quality report
City of Rialto 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