Santa Rosa Water Quality
California
According to EPA SDWIS, Santa Rosa, California is served by 41 community water systems covering about 186,211 people. The same extract lists 95 health-based violation records, most recently coded 5200 in 2024. Counts are historical EPA registry rows, not a current compliance or drinkability score.
Drinking water in Santa Rosa, California is delivered through 41 EPA-regulated community water systems serving an estimated 186,211 people. Each system is tracked in the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act, which requires testing for regulated contaminants, consumer notification of violations, and publication of an annual Consumer Confidence Report.
PlainEnviro's health-based SDWIS extract shows 95 violation records across the 41 active community systems shown here. Monitoring and reporting records are not present in the extract. The records carry 10 distinct EPA contaminant codes: LEAD AND COPPER RULE REVISIONS, Long Term 2 Enhanced Surface Water Treatment Rule, Stage 1 Disinfectants and Disinfection Byproducts Rule, Arsenic, Surface Water Treatment Rule and 5 others. 6 TRI-reporting industrial facilities are also located within the city limits.
A past EPA health-based registry row does not describe water delivered today or current compliance status; utilities notify customers and remediate under state primacy oversight when required. For current water-quality status and treatment practices, review your local utility's most recent Consumer Confidence Report or contact the California drinking water program. All records above reflect federal EPA SDWIS data and are not independently verified against state databases.
Community Water Systems
| System Name | Pop. Served | Violations | Status |
|---|---|---|---|
| SANTA ROSA, CITY OF | 175,396 | 0 | Clean |
| PENNGROVE WATER COMPANY (PUC) | 1,742 | 0 | Clean |
| SONOMA COUNTY CSA 41-FITCH MOUNTAIN | 1,265 | 0 | Clean |
| KENWOOD VILLAGE WATER COMPANY (PUC) | 1,029 | 0 | Clean |
| CANON MANOR WATER SYSTEM | 805 | 0 | Clean |
| WILLOWSIDE MUTUAL WATER COMPANY | 448 | 0 | Clean |
| BENNETT RIDGE MUTUAL WATER COMPANY | 439 | 0 | Clean |
| SONOMA COUNTY CSA 41-SALMON CREEK | 427 | 0 | Clean |
| LEISURE MOBILE HOME PARK | 410 | 0 | Clean |
| SONOMA COUNTY CSA 41-JENNER | 406 | 18 | Health |
| BRANGER MUTUAL WATER COMPANY, INC. | 300 | 2 | Health |
| HOLLAND HEIGHTS MUTUAL WATER COMPANY | 300 | 0 | Clean |
| SONOMA COUNTY CSA 41-FREESTONE | 290 | 4 | Health |
| NORTH STAR MOBILE HOME PARK | 221 | 0 | Clean |
| MOBILE HOME ESTATES | 210 | 1 | Health |
| JAMES COURT WATER SYSTEM | 208 | 1 | Health |
| RANDAL'S RANCHETTE MUTUAL WATER COMPANY | 200 | 1 | Health |
| YULUPA MUTUAL WATER COMPANY | 200 | 0 | Clean |
| EL PORTAL MOBILE ESTATES | 200 | 10 | Health |
| CASPAR SOUTH SERVICE COMPANY | 188 | 0 | Clean |
| SHAMROCK MOBILE HOME PARK | 188 | 0 | Clean |
| SONOMA MOUNTAIN COUNTY WATER DISTRICT | 181 | 0 | Clean |
| Kashia | 153 | 9 | Health |
| SUNSET PARK COMMUNITY | 141 | 1 | Health |
| END-O-VALLEY MUTUAL WATER COMPANY | 129 | 0 | Clean |
| PARK ROYAL MUTUAL WATER COMPANY | 75 | 2 | Health |
| WILSHIRE HEIGHTS MUTUAL WATER COMPANY | 70 | 0 | Clean |
| BLUE LAKES VILLAGE | 65 | 0 | Clean |
| MELITA HEIGHTS MUTUAL WATER COMPANY | 64 | 0 | Clean |
| MARK WEST ACRES MWC | 61 | 0 | Clean |
| DELORES LANE WATER SYSTEM | 59 | 3 | Health |
| ATHENA TERRACE MUTUAL WATER COMPANY | 50 | 0 | Clean |
| SUMMIT VIEW RANCH MUTUAL WATER CO. | 45 | 0 | Clean |
| INDIAN CREEK TRAILER PARK | 43 | 4 | Health |
| WEST WATER COMPANY (PUC) | 40 | 0 | Clean |
| CRYSTALS | 40 | 0 | Clean |
| EVERGREEN RETREAT MHP | 39 | 2 | Health |
| CORBY AVENUE APARTMENTS | 38 | 0 | Clean |
| LOCH HAVEN MUTUAL WATER COMPANY | 26 | 36 | Health |
| MARK WEST MEADOWS MUTUAL WATER | 20 | 1 | Health |
| SONOMA COUNTY WATER AGENCY | 0 | 0 | Clean |
Does this city have health-based water violations?
These health-based records can represent Maximum Contaminant Level (MCL), Treatment Technique (TT), or Maximum Residual Disinfectant Level (MRDL) categories. A historical record does not establish that water is currently unsafe.
| Water system | Contaminant | Begin Date |
|---|---|---|
| INDIAN CREEK TRAILER PARK | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| MARK WEST MEADOWS MUTUAL WATER | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| EL PORTAL MOBILE ESTATES | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| SUNSET PARK COMMUNITY | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| MOBILE HOME ESTATES | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| RANDAL'S RANCHETTE MUTUAL WATER COMPANY | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| BRANGER MUTUAL WATER COMPANY, INC. | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| INDIAN CREEK TRAILER PARK | Long Term 2 Enhanced Surface Water Treatment Rule | 2023-02-01 |
| Kashia | Stage 1 Disinfectants and Disinfection Byproducts Rule | 2022-04-01 |
| PARK ROYAL MUTUAL WATER COMPANY | Arsenic | 2021-04-01 |
| INDIAN CREEK TRAILER PARK | Surface Water Treatment Rule | 2021-01-01 |
| PARK ROYAL MUTUAL WATER COMPANY | Arsenic | 2021-01-01 |
| BRANGER MUTUAL WATER COMPANY, INC. | Arsenic | 2021-01-01 |
| SONOMA COUNTY CSA 41-JENNER | Total Haloacetic Acids (HAA5) | 2020-07-01 |
| SONOMA COUNTY CSA 41-JENNER | Total Haloacetic Acids (HAA5) | 2020-07-01 |
| SONOMA COUNTY CSA 41-JENNER | TTHM | 2020-04-01 |
| SONOMA COUNTY CSA 41-JENNER | TTHM | 2020-04-01 |
| SONOMA COUNTY CSA 41-JENNER | Total Haloacetic Acids (HAA5) | 2020-04-01 |
| SONOMA COUNTY CSA 41-JENNER | Total Haloacetic Acids (HAA5) | 2020-04-01 |
| SONOMA COUNTY CSA 41-JENNER | TTHM | 2020-01-01 |
| SONOMA COUNTY CSA 41-JENNER | TTHM | 2020-01-01 |
| SONOMA COUNTY CSA 41-JENNER | Total Haloacetic Acids (HAA5) | 2020-01-01 |
| SONOMA COUNTY CSA 41-JENNER | Total Haloacetic Acids (HAA5) | 2020-01-01 |
| SONOMA COUNTY CSA 41-JENNER | TTHM | 2019-10-01 |
| SONOMA COUNTY CSA 41-JENNER | TTHM | 2019-10-01 |
| SONOMA COUNTY CSA 41-JENNER | Total Haloacetic Acids (HAA5) | 2019-10-01 |
| SONOMA COUNTY CSA 41-JENNER | Total Haloacetic Acids (HAA5) | 2019-10-01 |
| Kashia | Stage 1 Disinfectants and Disinfection Byproducts Rule | 2019-10-01 |
| Kashia | Stage 1 Disinfectants and Disinfection Byproducts Rule | 2019-10-01 |
| EVERGREEN RETREAT MHP | Groundwater Rule | 2019-04-01 |
| EVERGREEN RETREAT MHP | Groundwater Rule | 2019-04-01 |
| JAMES COURT WATER SYSTEM | Groundwater Rule | 2019-04-01 |
| SONOMA COUNTY CSA 41-JENNER | TTHM | 2018-07-01 |
| SONOMA COUNTY CSA 41-JENNER | TTHM | 2018-04-01 |
| SONOMA COUNTY CSA 41-JENNER | TTHM | 2018-01-01 |
| Kashia | Interim Enhanced Surface Water Treatment Rule | 2017-11-01 |
| Kashia | Interim Enhanced Surface Water Treatment Rule | 2017-11-01 |
| DELORES LANE WATER SYSTEM | Arsenic | 2017-10-01 |
| DELORES LANE WATER SYSTEM | Arsenic | 2017-10-01 |
| DELORES LANE WATER SYSTEM | Arsenic | 2017-10-01 |
| LOCH HAVEN MUTUAL WATER COMPANY | Arsenic | 2017-10-01 |
| SONOMA COUNTY CSA 41-JENNER | TTHM | 2017-10-01 |
| Kashia | Interim Enhanced Surface Water Treatment Rule | 2017-10-01 |
| Kashia | Interim Enhanced Surface Water Treatment Rule | 2017-10-01 |
| Kashia | Interim Enhanced Surface Water Treatment Rule | 2017-09-01 |
| Kashia | Interim Enhanced Surface Water Treatment Rule | 2017-09-01 |
| LOCH HAVEN MUTUAL WATER COMPANY | Arsenic | 2017-07-01 |
| LOCH HAVEN MUTUAL WATER COMPANY | Arsenic | 2017-04-01 |
| LOCH HAVEN MUTUAL WATER COMPANY | Arsenic | 2017-01-01 |
| LOCH HAVEN MUTUAL WATER COMPANY | Arsenic | 2016-10-01 |
What are Santa Rosa's health-based records for?
Santa Rosa's health-based violation records carry 8 distinct EPA codes: some name a substance, others the drinking-water rule that was breached. Counts are records on file in the EPA SDWIS extract, not current test results.
| Contaminant | Records | Systems |
|---|---|---|
| Arsenic | 42 | 4 |
| Total Haloacetic Acids (HAA5) | 11 | 2 |
| Tthm | 11 | 2 |
| Trichloroethylene | 9 | 1 |
| Lead and Copper Rule Revisions | 7 | 7 |
| Interim Enhanced Surface Water Treatment Rule | 6 | 1 |
| Groundwater Rule | 3 | 2 |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | 3 | 1 |
TRI Facilities in Santa Rosa
| Facility | Total Releases |
|---|---|
| Keysight Technologies Inc | 55.9K lbs |
| Nick Barbieri Trucking LLC | 13.7K lbs |
| Itt Cannon LLC DBA Biw Connector Systems | 341 lbs |
| Bodean Co Inc | 1 lbs |
| Syar Industries | 0 lbs |
| General Hydroponics | 0 lbs |
Frequently Asked Questions
What does EPA SDWIS list for drinking water in Santa Rosa, California? ▼
How many water violations does Santa Rosa have in this EPA extract? ▼
What contaminants were found in Santa Rosa water? ▼
How many water systems serve Santa Rosa? ▼
Where does Santa Rosa get its drinking water? ▼
Are there pollution sources near Santa Rosa? ▼
How does Santa Rosa compare in California?
Of the 909 California places with at least one community water system on file, Santa Rosa ranks #7 by number of systems (41).
Either side of it: Bakersfield (49), Fresno (42), Madera (31), Chico (28)
About This Data
Figures here are the current EPA SDWIS extract joined to the 41 community water systems whose service area lists Santa Rosa, ranked against the 909 California places with at least one system on file. Data current as of 2026-08-25.
Water system data comes from the EPA's Safe Drinking Water Information System (SDWIS). PlainEnviro's violation fetch is restricted upstream to records EPA flags as health-based and then joined to active community water systems. Monitoring and reporting violations are not included.
A health-based violation row in this extract is a historical EPA registry entry. It does not describe water delivered today or current compliance status. Many records are later resolved, and public water systems notify customers when required. For current conditions, contact your local water utility or the state drinking water program.
TRI facility data comes from the EPA Toxic Release Inventory. Facilities shown are those that self-report to the TRI program. PlainEnviro presents this data without advocacy framing.
Read our methodology - how this data is sourced, computed, and verified.