SONOMA COUNTY MUTUAL WATER COMPANY
PWSID: CA4900640 · San Francisco, CA · Serves 40 people
According to EPA Safe Drinking Water Information System (SDWIS), SONOMA COUNTY MUTUAL WATER COMPANY (PWSID CA4900640) in San Francisco, CA is listed as a CWS water system covering about 40 people. The same extract lists 83 health-based violation records spanning 2011-2020. Those 83 health-based rows for SONOMA COUNTY MUTUAL WATER COMPANY cover contaminants such as Surface Water Treatment Rule; they remain historical EPA registry entries, not a current compliance or drinkability score.
SONOMA COUNTY MUTUAL WATER COMPANY has 83 health-based violation records in this historical extract. Monitoring and reporting records are not included.
PlainEnviro's health-based SDWIS extract covers monitoring and reporting violations only -- it does not include unresolved enforcement actions in progress or corrective steps a utility has taken since the extract date. 1 distinct EPA contaminant code appears in this system's record, including Surface Water Treatment Rule. Recorded violations span 2011–2020. Day-to-day primacy enforcement for this system runs through the California drinking-water program, not EPA directly.
A historical health-based record does not necessarily describe current water quality or compliance. The most authoritative current source is the utility's annual Consumer Confidence Report. For enforcement history and corrective-action orders, consult EPA ECHO and the California state drinking-water program's public portal.
System Details
- EPA ID (PWSID)
- CA4900640
- System Type
- CWS
- Water Source
- Surface Water
- Location
- San Francisco, CA
- Population Served
- 40
- Health Violations
- Yes (83)
What contaminants are in this water system?
| Contaminant | Violations | Health-Based |
|---|---|---|
| Surface Water Treatment Rule | 83 | 83 |
Violation History (83)
Frequently Asked Questions
What does EPA SDWIS list for SONOMA COUNTY MUTUAL WATER COMPANY?
How many people does SONOMA COUNTY MUTUAL WATER COMPANY serve?
What violations does SONOMA COUNTY MUTUAL WATER COMPANY have?
What contaminants have been found in SONOMA COUNTY MUTUAL WATER COMPANY water?
Compare beyond California
Nationwide peers by violations & population served
Cross-state SDWIS systems nearest SONOMA COUNTY MUTUAL WATER COMPANY on cumulative violation count (83) and EPA-reported population served (40). Violation-count peers include BODCAW RURAL WATER SYSTEM, BURLINGTON CITY OF, VILLAGE OF CHATHAM WATER SYSTEM.
Similar violation count
Nearest cross-state community systems (500+ served) by SDWIS violations on record.
Nearby Water Systems
Explore More
About This Data
SONOMA COUNTY MUTUAL WATER COMPANY (CA4900640) is drawn from EPA SDWIS. Nearby county systems in this extract include PRESIDIO OF SAN FRANCISCO; JOSHUA VALLEY UTILITY COMPANY; MILE HIGH MOBILE HOME PARK; RIDGEWOOD MOBILE HOME PARK. Health-based rows (83 MCL/TT) are historical registry state, not a current drinkability score.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.