Public water system record
City of Mountain View
Serves Mountain View, Santa Clara County, CA · 81,501 people served
Federal records show no health-based violations and 1 monitoring/reporting issue for City of Mountain View 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
- City of Mountain View draws water from 4 wells.
- Most recent formal enforcement: compliance order (no penalty) by California, April 2015.
- Record on file since 1988, with 3 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 18,394 service lines.
Check whether City of Mountain View 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 |
|---|---|---|
|
E. coli
Monitoring and reporting
|
Jul 1, 2013 | Resolved |
Full record since 1988
EPA's records for City of Mountain View go back to 1988. Before October 19, 2016 they list 3 health-based violations (3 resolved) and 4 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 0 | 1 |
| 1990s | 2 | 0 |
| 2000s | 0 | 2 |
| 2010 to October 18, 2016 | 1 | 1 |
Most recent health-based violation before October 19, 2016: Surface Water Treatment Rule, began March 2015, Resolved.
Show all 3 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Surface Water Treatment Rule
Treatment technique failure
|
Mar 1, 2015 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Mar 1, 1995 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Mar 1, 1992 | Resolved |
Enforcement actions
California regulators took 6 formal enforcement actions against City of Mountain View between 1992 and 2015. The most recent was a compliance order (no penalty) in April 2015.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Apr 21, 2015 | California | Compliance order (no penalty) | 1 violation (1 health-based): Surface Water Treatment Rule |
| Aug 1, 2013 | California | Compliance order (no penalty) | 1 violation: E. coli |
| Jun 8, 2001 | California | Compliance order (no penalty) | 1 violation: Fluoride |
| Apr 18, 2001 | California | Compliance order (no penalty) | 1 violation: Fluoride |
| Apr 2, 1997 | California | Compliance order (no penalty) | 1 violation (1 health-based): Surface Water Treatment Rule |
| Apr 3, 1992 | California | Compliance order (no penalty) | 1 violation (1 health-based): Surface Water Treatment Rule |
Where the water comes from
City of Mountain View draws water from 4 wells. It also buys water from San Francisco Regional Water System and Santa Clara Valley Water District. It also has emergency connections to City of Sunnyvale and City of Palo Alto. 1 smaller public system such as schools, businesses or campgrounds buys water from City of Mountain View. 2 other public water systems have emergency connections to City of Mountain View.
Buys water from
- San Francisco Regional Water System Burlingame, CA
- Santa Clara Valley Water District San Jose, CA
Emergency or part-time connections to
- City of Sunnyvale Sunnyvale, CA
- City of Palo Alto Palo Alto, CA
Annual water quality report
City of Mountain View 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