DIAMOND A MUTUAL WATER COMPANY
PWSID: CA4900562 · Sonoma, CA · Serves 640 people
According to EPA Safe Drinking Water Information System (SDWIS), DIAMOND A MUTUAL WATER COMPANY (PWSID CA4900562) in Sonoma, CA is listed as a CWS water system covering about 640 people. The same extract lists 1 health-based violation record spanning 2024-2024. Those 1 health-based row for DIAMOND A MUTUAL WATER COMPANY cover contaminants such as LEAD AND COPPER RULE REVISIONS; they remain historical EPA registry entries, not a current compliance or drinkability score.
DIAMOND A MUTUAL WATER COMPANY has 1 health-based violation record 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 LEAD AND COPPER RULE REVISIONS. Recorded violations span 2024–2024. 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)
- CA4900562
- System Type
- CWS
- Water Source
- Groundwater
- Location
- Sonoma, CA
- Population Served
- 640
- Health Violations
- Yes (1)
What contaminants are in this water system?
| Contaminant | Violations | Health-Based |
|---|---|---|
| LEAD AND COPPER RULE REVISIONS | 1 | 1 |
Violation History (1)
| Contaminant | Health | Date |
|---|---|---|
| LEAD AND COPPER RULE REVISIONS | Yes | Oct 17, 2024 |
Frequently Asked Questions
What does EPA SDWIS list for DIAMOND A MUTUAL WATER COMPANY?
How many people does DIAMOND A MUTUAL WATER COMPANY serve?
What violations does DIAMOND A MUTUAL WATER COMPANY have?
What contaminants have been found in DIAMOND A MUTUAL WATER COMPANY water?
Compare beyond California
Nationwide peers by violations & population served
Cross-state SDWIS systems nearest DIAMOND A MUTUAL WATER COMPANY on cumulative violation count (1) and EPA-reported population served (640). Violation-count peers include CHOCTAW - CONEHATTA, CHOCTAW - PEARL RIVER, CHOCTAW - TUCKER. Population peers include SWEETWATER COMMUNITY INC, CORDOVA, LAGUNA VISTA SUBDIVISION.
Similar violation count
Nearest cross-state community systems (500+ served) by SDWIS violations on record.
Similar population served
Nearest cross-state systems by EPA SDWIS population_served (same 500+ gate).
Nearby Water Systems
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About This Data
DIAMOND A MUTUAL WATER COMPANY (CA4900562) is drawn from EPA SDWIS. Nearby county systems in this extract include SANTA ROSA, CITY OF; PETALUMA, CITY OF; ROHNERT PARK, CITY OF; WINDSOR, TOWN OF. Health-based rows (1 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.