Walnut Grove Water Quality
California
According to EPA SDWIS, Walnut Grove, California is served by 3 community water systems covering about 253 people. The same extract lists 57 health-based violation records, most recently coded 2950 in 2023. Counts are historical EPA registry rows, not a current compliance or drinkability score.
Drinking water in Walnut Grove, California is delivered through 3 EPA-regulated community water systems serving an estimated 253 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 57 violation records across the 3 active community systems shown here. Monitoring and reporting records are not present in the extract. The records carry 2 distinct EPA contaminant codes: TTHM, Arsenic.
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 |
|---|---|---|---|
| SNUG HARBOR RV LP | 125 | 49 | Health |
| LOCKE WATER WORKS CO [SWS] | 80 | 8 | Health |
| TUNNEL TRAILER PARK | 48 | 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 |
|---|---|---|
| SNUG HARBOR RV LP | TTHM | 2023-01-01 |
| SNUG HARBOR RV LP | TTHM | 2023-01-01 |
| SNUG HARBOR RV LP | TTHM | 2023-01-01 |
| SNUG HARBOR RV LP | TTHM | 2022-10-01 |
| SNUG HARBOR RV LP | TTHM | 2022-10-01 |
| SNUG HARBOR RV LP | TTHM | 2022-10-01 |
| SNUG HARBOR RV LP | TTHM | 2022-07-01 |
| SNUG HARBOR RV LP | TTHM | 2022-07-01 |
| SNUG HARBOR RV LP | TTHM | 2022-07-01 |
| SNUG HARBOR RV LP | TTHM | 2021-04-01 |
| LOCKE WATER WORKS CO [SWS] | Arsenic | 2021-01-01 |
| LOCKE WATER WORKS CO [SWS] | Arsenic | 2017-10-01 |
| LOCKE WATER WORKS CO [SWS] | Arsenic | 2017-07-01 |
| LOCKE WATER WORKS CO [SWS] | Arsenic | 2017-01-01 |
| SNUG HARBOR RV LP | Arsenic | 2017-01-01 |
| SNUG HARBOR RV LP | Arsenic | 2017-01-01 |
| LOCKE WATER WORKS CO [SWS] | Arsenic | 2016-10-01 |
| SNUG HARBOR RV LP | Arsenic | 2016-10-01 |
| SNUG HARBOR RV LP | Arsenic | 2016-10-01 |
| LOCKE WATER WORKS CO [SWS] | Arsenic | 2016-07-01 |
| SNUG HARBOR RV LP | Arsenic | 2016-07-01 |
| SNUG HARBOR RV LP | Arsenic | 2016-07-01 |
| LOCKE WATER WORKS CO [SWS] | Arsenic | 2016-04-01 |
| SNUG HARBOR RV LP | Arsenic | 2016-04-01 |
| LOCKE WATER WORKS CO [SWS] | Arsenic | 2016-01-01 |
| SNUG HARBOR RV LP | Arsenic | 2016-01-01 |
| SNUG HARBOR RV LP | Arsenic | 2015-10-01 |
| SNUG HARBOR RV LP | Arsenic | 2015-01-01 |
| SNUG HARBOR RV LP | Arsenic | 2015-01-01 |
| SNUG HARBOR RV LP | Arsenic | 2014-10-01 |
| SNUG HARBOR RV LP | Arsenic | 2014-10-01 |
| SNUG HARBOR RV LP | Arsenic | 2014-07-01 |
| SNUG HARBOR RV LP | Arsenic | 2014-07-01 |
| SNUG HARBOR RV LP | Arsenic | 2014-04-01 |
| SNUG HARBOR RV LP | Arsenic | 2014-04-01 |
| SNUG HARBOR RV LP | Arsenic | 2014-01-01 |
| SNUG HARBOR RV LP | Arsenic | 2014-01-01 |
| SNUG HARBOR RV LP | Arsenic | 2013-10-01 |
| SNUG HARBOR RV LP | Arsenic | 2013-10-01 |
| SNUG HARBOR RV LP | Arsenic | 2013-07-01 |
| SNUG HARBOR RV LP | Arsenic | 2013-07-01 |
| SNUG HARBOR RV LP | Arsenic | 2013-04-01 |
| SNUG HARBOR RV LP | Arsenic | 2013-04-01 |
| SNUG HARBOR RV LP | Arsenic | 2013-01-01 |
| SNUG HARBOR RV LP | Arsenic | 2013-01-01 |
| SNUG HARBOR RV LP | Arsenic | 2012-10-01 |
| SNUG HARBOR RV LP | Arsenic | 2012-10-01 |
| SNUG HARBOR RV LP | Arsenic | 2012-07-01 |
| SNUG HARBOR RV LP | Arsenic | 2012-07-01 |
| SNUG HARBOR RV LP | Arsenic | 2012-04-01 |
Frequently Asked Questions
What does EPA SDWIS list for drinking water in Walnut Grove, California? ▼
How many water violations does Walnut Grove have in this EPA extract? ▼
What contaminants were found in Walnut Grove water? ▼
How many water systems serve Walnut Grove? ▼
Where does Walnut Grove get its drinking water? ▼
How does Walnut Grove compare in California?
Of the 912 California places with at least one community water system on file, Walnut Grove ranks #300 by number of systems (3).
Either side of it: Trinity Center (3), Vallejo (3), Warner Springs (3), Wasco (3)
About This Data
Figures here are the current EPA SDWIS extract joined to the 3 community water systems whose service area lists Walnut Grove, ranked against the 912 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.