Lake Isabella Water Quality
California
According to EPA SDWIS, Lake Isabella, California is served by 7 community water systems covering about 594 people. The same extract lists 109 health-based violation records, most recently coded 1005 in 2025. Counts are historical EPA registry rows, not a current compliance or drinkability score.
Drinking water in Lake Isabella, California is delivered through 7 EPA-regulated community water systems serving an estimated 594 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 109 violation records across the 7 active community systems shown here. Monitoring and reporting records are not present in the extract. The records carry 5 distinct EPA contaminant codes: Arsenic, Nitrate, LEAD AND COPPER RULE REVISIONS, Revised Total Coliform Rule, Lead and Copper Rule.
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 |
|---|---|---|---|
| KERN VALLEY MUTUAL WATER COMPANY | 132 | 4 | Health |
| OAK KNOLLS MUTUAL WATER COMPANY | 123 | 8 | Health |
| CLARK STREET COMMUNITY WELL | 90 | 2 | Health |
| KERNVALE MUTUAL WATER CO | 75 | 0 | Clean |
| HUNGRY GULCH MWC | 74 | 57 | Health |
| FOURTH STREET WATER SYSTEM | 56 | 34 | Health |
| CYPRESS CANYON WATER SYSTEM | 44 | 4 | 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 |
|---|---|---|
| HUNGRY GULCH MWC | Arsenic | 2025-10-01 |
| HUNGRY GULCH MWC | Arsenic | 2025-07-01 |
| HUNGRY GULCH MWC | Arsenic | 2025-04-01 |
| OAK KNOLLS MUTUAL WATER COMPANY | Nitrate | 2025-01-01 |
| HUNGRY GULCH MWC | Arsenic | 2025-01-01 |
| CYPRESS CANYON WATER SYSTEM | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| CLARK STREET COMMUNITY WELL | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| OAK KNOLLS MUTUAL WATER COMPANY | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| KERN VALLEY MUTUAL WATER COMPANY | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| OAK KNOLLS MUTUAL WATER COMPANY | Nitrate | 2024-10-01 |
| HUNGRY GULCH MWC | Arsenic | 2024-10-01 |
| HUNGRY GULCH MWC | Arsenic | 2024-10-01 |
| OAK KNOLLS MUTUAL WATER COMPANY | Nitrate | 2024-07-01 |
| HUNGRY GULCH MWC | Arsenic | 2024-07-01 |
| HUNGRY GULCH MWC | Arsenic | 2024-07-01 |
| OAK KNOLLS MUTUAL WATER COMPANY | Nitrate | 2024-04-01 |
| OAK KNOLLS MUTUAL WATER COMPANY | Nitrate | 2024-04-01 |
| HUNGRY GULCH MWC | Arsenic | 2024-04-01 |
| HUNGRY GULCH MWC | Arsenic | 2024-04-01 |
| OAK KNOLLS MUTUAL WATER COMPANY | Nitrate | 2024-01-01 |
| OAK KNOLLS MUTUAL WATER COMPANY | Nitrate | 2024-01-01 |
| HUNGRY GULCH MWC | Arsenic | 2024-01-01 |
| HUNGRY GULCH MWC | Arsenic | 2024-01-01 |
| HUNGRY GULCH MWC | Arsenic | 2023-10-01 |
| HUNGRY GULCH MWC | Arsenic | 2023-10-01 |
| CYPRESS CANYON WATER SYSTEM | Revised Total Coliform Rule | 2023-08-01 |
| CYPRESS CANYON WATER SYSTEM | Revised Total Coliform Rule | 2023-08-01 |
| CYPRESS CANYON WATER SYSTEM | Revised Total Coliform Rule | 2023-08-01 |
| HUNGRY GULCH MWC | Arsenic | 2023-07-01 |
| HUNGRY GULCH MWC | Arsenic | 2023-07-01 |
| HUNGRY GULCH MWC | Arsenic | 2023-07-01 |
| HUNGRY GULCH MWC | Arsenic | 2023-04-01 |
| HUNGRY GULCH MWC | Arsenic | 2023-04-01 |
| HUNGRY GULCH MWC | Arsenic | 2023-04-01 |
| HUNGRY GULCH MWC | Arsenic | 2023-01-01 |
| HUNGRY GULCH MWC | Arsenic | 2023-01-01 |
| HUNGRY GULCH MWC | Arsenic | 2023-01-01 |
| HUNGRY GULCH MWC | Arsenic | 2022-10-01 |
| HUNGRY GULCH MWC | Arsenic | 2022-10-01 |
| HUNGRY GULCH MWC | Arsenic | 2022-07-01 |
| HUNGRY GULCH MWC | Arsenic | 2022-07-01 |
| HUNGRY GULCH MWC | Arsenic | 2022-07-01 |
| KERN VALLEY MUTUAL WATER COMPANY | Revised Total Coliform Rule | 2022-05-01 |
| KERN VALLEY MUTUAL WATER COMPANY | Revised Total Coliform Rule | 2022-05-01 |
| KERN VALLEY MUTUAL WATER COMPANY | Revised Total Coliform Rule | 2022-05-01 |
| HUNGRY GULCH MWC | Arsenic | 2022-04-01 |
| HUNGRY GULCH MWC | Arsenic | 2022-04-01 |
| HUNGRY GULCH MWC | Arsenic | 2022-04-01 |
| HUNGRY GULCH MWC | Arsenic | 2022-01-01 |
| HUNGRY GULCH MWC | Arsenic | 2022-01-01 |
What are Lake Isabella's health-based records for?
Lake Isabella'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 | 91 | 2 |
| Nitrate | 7 | 1 |
| Revised Total Coliform Rule | 6 | 2 |
| Lead and Copper Rule Revisions | 4 | 4 |
| Lead and Copper Rule | 1 | 1 |
Frequently Asked Questions
What does EPA SDWIS list for drinking water in Lake Isabella, California? ▼
How many water violations does Lake Isabella have in this EPA extract? ▼
What contaminants were found in Lake Isabella water? ▼
How many water systems serve Lake Isabella? ▼
Where does Lake Isabella get its drinking water? ▼
How does Lake Isabella compare in California?
Of the 909 California places with at least one community water system on file, Lake Isabella ranks #87 by number of systems (7).
Either side of it: Indio (7), Kernville (7), Needles (7), Oroville (7)
About This Data
Figures here are the current EPA SDWIS extract joined to the 7 community water systems whose service area lists Lake Isabella, 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.