Rancho Cordova Water Quality
California
According to EPA SDWIS, Rancho Cordova, California is served by 12 community water systems covering about 134,193 people. The same extract lists 112 health-based violation records, most recently coded 2456 in 2023. Counts are historical EPA registry rows, not a current compliance or drinkability score.
Drinking water in Rancho Cordova, California is delivered through 12 EPA-regulated community water systems serving an estimated 134,193 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 112 violation records across the 12 active community systems shown here. Monitoring and reporting records are not present in the extract. The records carry 5 distinct EPA contaminant codes: Total Haloacetic Acids (HAA5), TTHM, Arsenic, Surface Water Treatment Rule, Coliform (TCR). 2 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 |
|---|---|---|---|
| GOLDEN STATE WATER CO. - CORDOVA | 47,161 | 4 | Health |
| GOLDEN STATE WATER COMPANY - SIMI VALLEY | 45,128 | 0 | Clean |
| GOLDEN STATE WATER COMPANY - BAY POINT | 23,731 | 0 | Clean |
| GOLDEN STATE WATER CO - ARDEN WATER SERV | 5,658 | 0 | Clean |
| GOLDEN STATE WATER CO.-CLEARLAKE SYSTEM | 4,644 | 0 | Clean |
| GOLDEN STATE WATER COMPANY - NIPOMO | 4,506 | 0 | Clean |
| GOLDEN STATE WATER COMPANY-CYPRESS RIDGE | 2,026 | 0 | Clean |
| GOLDEN STATE WATER COMPANY - LAKE MARIE | 545 | 0 | Clean |
| HOMETOWN COLONIAL ESTATES LLC | 400 | 0 | Clean |
| GOLDEN STATE WATER CO. - ROBBINS | 205 | 72 | Health |
| GOLDEN STATE WATER CO - SAN JUAN OAKS | 159 | 0 | Clean |
| GOLDEN STATE WATER COMPANY - SOUTH SHORE | 30 | 36 | Health |
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 |
|---|---|---|
| GOLDEN STATE WATER COMPANY - SOUTH SHORE | Total Haloacetic Acids (HAA5) | 2023-07-01 |
| GOLDEN STATE WATER COMPANY - SOUTH SHORE | Total Haloacetic Acids (HAA5) | 2023-07-01 |
| GOLDEN STATE WATER COMPANY - SOUTH SHORE | Total Haloacetic Acids (HAA5) | 2023-07-01 |
| GOLDEN STATE WATER COMPANY - SOUTH SHORE | TTHM | 2023-04-01 |
| GOLDEN STATE WATER COMPANY - SOUTH SHORE | TTHM | 2023-04-01 |
| GOLDEN STATE WATER COMPANY - SOUTH SHORE | TTHM | 2023-04-01 |
| GOLDEN STATE WATER COMPANY - SOUTH SHORE | Total Haloacetic Acids (HAA5) | 2023-04-01 |
| GOLDEN STATE WATER COMPANY - SOUTH SHORE | Total Haloacetic Acids (HAA5) | 2023-04-01 |
| GOLDEN STATE WATER COMPANY - SOUTH SHORE | Total Haloacetic Acids (HAA5) | 2023-04-01 |
| GOLDEN STATE WATER COMPANY - SOUTH SHORE | Total Haloacetic Acids (HAA5) | 2023-01-01 |
| GOLDEN STATE WATER COMPANY - SOUTH SHORE | Total Haloacetic Acids (HAA5) | 2023-01-01 |
| GOLDEN STATE WATER COMPANY - SOUTH SHORE | Total Haloacetic Acids (HAA5) | 2023-01-01 |
| GOLDEN STATE WATER COMPANY - SOUTH SHORE | Total Haloacetic Acids (HAA5) | 2022-10-01 |
| GOLDEN STATE WATER COMPANY - SOUTH SHORE | Total Haloacetic Acids (HAA5) | 2022-07-01 |
| GOLDEN STATE WATER COMPANY - SOUTH SHORE | Total Haloacetic Acids (HAA5) | 2022-04-01 |
| GOLDEN STATE WATER COMPANY - SOUTH SHORE | Total Haloacetic Acids (HAA5) | 2022-01-01 |
| GOLDEN STATE WATER CO. - ROBBINS | Arsenic | 2021-10-01 |
| GOLDEN STATE WATER CO. - ROBBINS | Arsenic | 2021-10-01 |
| GOLDEN STATE WATER CO. - ROBBINS | Arsenic | 2021-10-01 |
| GOLDEN STATE WATER CO. - ROBBINS | Arsenic | 2021-07-01 |
| GOLDEN STATE WATER CO. - ROBBINS | Arsenic | 2021-07-01 |
| GOLDEN STATE WATER CO. - ROBBINS | Arsenic | 2021-07-01 |
| GOLDEN STATE WATER CO. - ROBBINS | Arsenic | 2021-04-01 |
| GOLDEN STATE WATER CO. - ROBBINS | Arsenic | 2021-04-01 |
| GOLDEN STATE WATER CO. - ROBBINS | Arsenic | 2021-04-01 |
| GOLDEN STATE WATER COMPANY - SOUTH SHORE | Total Haloacetic Acids (HAA5) | 2021-04-01 |
| GOLDEN STATE WATER CO. - ROBBINS | Arsenic | 2021-01-01 |
| GOLDEN STATE WATER CO. - ROBBINS | Arsenic | 2021-01-01 |
| GOLDEN STATE WATER CO. - ROBBINS | Arsenic | 2021-01-01 |
| GOLDEN STATE WATER COMPANY - SOUTH SHORE | Total Haloacetic Acids (HAA5) | 2021-01-01 |
| GOLDEN STATE WATER CO. - ROBBINS | Arsenic | 2020-10-01 |
| GOLDEN STATE WATER CO. - ROBBINS | Arsenic | 2020-10-01 |
| GOLDEN STATE WATER CO. - ROBBINS | Arsenic | 2020-10-01 |
| GOLDEN STATE WATER COMPANY - SOUTH SHORE | Total Haloacetic Acids (HAA5) | 2020-10-01 |
| GOLDEN STATE WATER CO. - ROBBINS | Arsenic | 2020-07-01 |
| GOLDEN STATE WATER CO. - ROBBINS | Arsenic | 2020-07-01 |
| GOLDEN STATE WATER CO. - ROBBINS | Arsenic | 2020-07-01 |
| GOLDEN STATE WATER CO. - ROBBINS | Arsenic | 2020-04-01 |
| GOLDEN STATE WATER CO. - ROBBINS | Arsenic | 2020-04-01 |
| GOLDEN STATE WATER CO. - ROBBINS | Arsenic | 2020-04-01 |
| GOLDEN STATE WATER COMPANY - SOUTH SHORE | Total Haloacetic Acids (HAA5) | 2020-04-01 |
| GOLDEN STATE WATER CO. - ROBBINS | Arsenic | 2020-01-01 |
| GOLDEN STATE WATER CO. - ROBBINS | Arsenic | 2020-01-01 |
| GOLDEN STATE WATER CO. - ROBBINS | Arsenic | 2020-01-01 |
| GOLDEN STATE WATER COMPANY - SOUTH SHORE | Total Haloacetic Acids (HAA5) | 2020-01-01 |
| GOLDEN STATE WATER CO. - ROBBINS | Arsenic | 2019-10-01 |
| GOLDEN STATE WATER CO. - ROBBINS | Arsenic | 2019-10-01 |
| GOLDEN STATE WATER CO. - ROBBINS | Arsenic | 2019-10-01 |
| GOLDEN STATE WATER COMPANY - SOUTH SHORE | Total Haloacetic Acids (HAA5) | 2019-10-01 |
| GOLDEN STATE WATER CO. - ROBBINS | Arsenic | 2019-07-01 |
What are Rancho Cordova's health-based records for?
Rancho Cordova's health-based violation records carry 5 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 | 72 | 1 |
| Total Haloacetic Acids (HAA5) | 30 | 1 |
| Tthm | 5 | 1 |
| Coliform (TCR) | 4 | 1 |
| Surface Water Treatment Rule | 1 | 1 |
TRI Facilities in Rancho Cordova
| Facility | Total Releases |
|---|---|
| Ampac Fine Chemicals LLC | 23.4K lbs |
| Livingston's Concrete Service Inc | 0 lbs |
Frequently Asked Questions
What does EPA SDWIS list for drinking water in Rancho Cordova, California? ▼
How many water violations does Rancho Cordova have in this EPA extract? ▼
What contaminants were found in Rancho Cordova water? ▼
How many water systems serve Rancho Cordova? ▼
Where does Rancho Cordova get its drinking water? ▼
Are there pollution sources near Rancho Cordova? ▼
How does Rancho Cordova compare in California?
Of the 909 California places with at least one community water system on file, Rancho Cordova ranks #34 by number of systems (12).
Either side of it: Gilroy (12), Irvine (12), Tehachapi (12), Three Rivers (12)
About This Data
Figures here are the current EPA SDWIS extract joined to the 12 community water systems whose service area lists Rancho Cordova, 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.