Madera Water Quality
California
According to EPA SDWIS, Madera, California is served by 31 community water systems covering about 88,940 people. The same extract lists 484 health-based violation records, most recently coded 2950 in 2025. Counts are historical EPA registry rows, not a current compliance or drinkability score.
Drinking water in Madera, California is delivered through 31 EPA-regulated community water systems serving an estimated 88,940 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 484 violation records across the 31 active community systems shown here. Monitoring and reporting records are not present in the extract. The records carry 10 distinct EPA contaminant codes: TTHM, Total Haloacetic Acids (HAA5), Arsenic, Combined Uranium, Surface Water Treatment Rule and 5 others. 9 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 |
|---|---|---|---|
| CITY OF MADERA | 66,560 | 0 | Clean |
| MADERA VALLEY WATER COMPANY | 6,494 | 0 | Clean |
| MADERA CO MD10A-MADERA RANCHOS | 3,172 | 0 | Clean |
| MADERA CO CSA 22C GUNNER RANCH | 3,050 | 0 | Clean |
| MADERA CO SA3-PARKSDALE | 1,789 | 1 | Health |
| MADERA CO CMD19-PARKWOOD | 1,637 | 0 | Clean |
| MADERA CO SA1-INDIAN LAKES | 1,562 | 0 | Clean |
| MD 33 FAIRMEAD | 568 | 0 | Clean |
| MADERA MH & RV PARK | 450 | 0 | Clean |
| MD 73 QUARTZ MOUNTAIN | 375 | 0 | Clean |
| MD 37 LA VINA | 350 | 0 | Clean |
| MD 46 AHWAHNEE RESORTS | 300 | 29 | Health |
| MD 63 MEADOW SPRINGS RANCH | 300 | 0 | Clean |
| MD 08 NORTH FORK WATER SYSTEM | 264 | 44 | Health |
| MD 05 MOUNTAIN RANCHES | 239 | 3 | Health |
| MD 07 MARINA VIEW HEIGHTS | 200 | 76 | Health |
| MADERA CO MD1-HIDDEN LAKE ESTATES | 162 | 102 | Health |
| MD 24 TEAFORD MEADOW LAKES | 150 | 60 | Health |
| MD 95 RANCHOS WEST | 150 | 0 | Clean |
| MD 60 DILLON ESTATES | 150 | 0 | Clean |
| MD 40 SUNSET RIDGE ESTATES | 150 | 0 | Clean |
| MADERA CO SA16 SUMNER HILL | 135 | 79 | Health |
| MD 43 MIAMI CREEK KNOLLS | 100 | 0 | Clean |
| SA 14 CHUK CHANSE SUBDIVISION | 100 | 0 | Clean |
| MD 42 STILL MEADOW | 100 | 88 | Health |
| BONADELLE RANCHOS NO. 2 MUTUAL WATER CO | 92 | 0 | Clean |
| SANDY CREEK VILLAGE MHP | 89 | 0 | Clean |
| MD 36 EASTIN ARCOLA | 84 | 0 | Clean |
| MD 58 SIERRA HIGHLANDS | 75 | 2 | Health |
| MD 28 RIPPERDAN SELF HELP | 48 | 0 | Clean |
| MD 85 VALETA | 45 | 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 |
|---|---|---|
| MADERA CO SA16 SUMNER HILL | TTHM | 2025-10-01 |
| MADERA CO SA16 SUMNER HILL | Total Haloacetic Acids (HAA5) | 2025-10-01 |
| MD 08 NORTH FORK WATER SYSTEM | Arsenic | 2025-10-01 |
| MD 24 TEAFORD MEADOW LAKES | Arsenic | 2025-10-01 |
| MD 24 TEAFORD MEADOW LAKES | Arsenic | 2025-10-01 |
| MADERA CO MD1-HIDDEN LAKE ESTATES | TTHM | 2025-10-01 |
| MADERA CO MD1-HIDDEN LAKE ESTATES | Total Haloacetic Acids (HAA5) | 2025-10-01 |
| MADERA CO SA16 SUMNER HILL | TTHM | 2025-07-01 |
| MADERA CO SA16 SUMNER HILL | Total Haloacetic Acids (HAA5) | 2025-07-01 |
| MD 08 NORTH FORK WATER SYSTEM | Arsenic | 2025-07-01 |
| MD 24 TEAFORD MEADOW LAKES | Arsenic | 2025-07-01 |
| MD 24 TEAFORD MEADOW LAKES | Arsenic | 2025-07-01 |
| MADERA CO MD1-HIDDEN LAKE ESTATES | TTHM | 2025-07-01 |
| MADERA CO MD1-HIDDEN LAKE ESTATES | Total Haloacetic Acids (HAA5) | 2025-07-01 |
| MD 42 STILL MEADOW | Arsenic | 2025-04-01 |
| MD 42 STILL MEADOW | Arsenic | 2025-04-01 |
| MADERA CO SA16 SUMNER HILL | TTHM | 2025-04-01 |
| MADERA CO SA16 SUMNER HILL | Total Haloacetic Acids (HAA5) | 2025-04-01 |
| MD 08 NORTH FORK WATER SYSTEM | Arsenic | 2025-04-01 |
| MD 24 TEAFORD MEADOW LAKES | Arsenic | 2025-04-01 |
| MD 24 TEAFORD MEADOW LAKES | Arsenic | 2025-04-01 |
| MADERA CO MD1-HIDDEN LAKE ESTATES | TTHM | 2025-04-01 |
| MADERA CO MD1-HIDDEN LAKE ESTATES | Total Haloacetic Acids (HAA5) | 2025-04-01 |
| MD 42 STILL MEADOW | Arsenic | 2025-01-01 |
| MD 42 STILL MEADOW | Arsenic | 2025-01-01 |
| MADERA CO SA16 SUMNER HILL | TTHM | 2025-01-01 |
| MADERA CO SA16 SUMNER HILL | Total Haloacetic Acids (HAA5) | 2025-01-01 |
| MD 08 NORTH FORK WATER SYSTEM | Arsenic | 2025-01-01 |
| MD 24 TEAFORD MEADOW LAKES | Arsenic | 2025-01-01 |
| MADERA CO MD1-HIDDEN LAKE ESTATES | TTHM | 2025-01-01 |
| MADERA CO MD1-HIDDEN LAKE ESTATES | Total Haloacetic Acids (HAA5) | 2025-01-01 |
| MD 42 STILL MEADOW | Combined Uranium | 2024-10-31 |
| MD 42 STILL MEADOW | Arsenic | 2024-10-01 |
| MD 42 STILL MEADOW | Arsenic | 2024-10-01 |
| MD 42 STILL MEADOW | Arsenic | 2024-10-01 |
| MADERA CO SA16 SUMNER HILL | TTHM | 2024-10-01 |
| MADERA CO SA16 SUMNER HILL | TTHM | 2024-10-01 |
| MADERA CO SA16 SUMNER HILL | Total Haloacetic Acids (HAA5) | 2024-10-01 |
| MADERA CO SA16 SUMNER HILL | Total Haloacetic Acids (HAA5) | 2024-10-01 |
| MD 08 NORTH FORK WATER SYSTEM | Arsenic | 2024-10-01 |
| MD 08 NORTH FORK WATER SYSTEM | Arsenic | 2024-10-01 |
| MD 24 TEAFORD MEADOW LAKES | Arsenic | 2024-10-01 |
| MD 24 TEAFORD MEADOW LAKES | Arsenic | 2024-10-01 |
| MADERA CO MD1-HIDDEN LAKE ESTATES | TTHM | 2024-10-01 |
| MADERA CO MD1-HIDDEN LAKE ESTATES | TTHM | 2024-10-01 |
| MADERA CO MD1-HIDDEN LAKE ESTATES | Total Haloacetic Acids (HAA5) | 2024-10-01 |
| MADERA CO MD1-HIDDEN LAKE ESTATES | Total Haloacetic Acids (HAA5) | 2024-10-01 |
| MD 42 STILL MEADOW | Combined Uranium | 2024-07-01 |
| MD 42 STILL MEADOW | Combined Uranium | 2024-07-01 |
| MD 42 STILL MEADOW | Arsenic | 2024-07-01 |
What are Madera's health-based records for?
Madera'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 | 209 | 5 |
| Total Haloacetic Acids (HAA5) | 85 | 2 |
| Tthm | 80 | 2 |
| Combined Uranium | 74 | 3 |
| Gross Alpha Particle Activity | 14 | 3 |
| Surface Water Treatment Rule | 9 | 2 |
| Carbon, Total | 6 | 2 |
| Coliform (TCR) | 3 | 3 |
TRI Facilities in Madera
| Facility | Total Releases |
|---|---|
| Ardagh Glass Inc | 571.1K lbs |
| Florestone LLC | 347.6K lbs |
| Constellation Brands US Ops Inc (dba Mission Bell Winery) | 26.5K lbs |
| Oldcastle Infrastructure Inc. | 19.4K lbs |
| Pacific Ethanol Madera LLC | 6.7K lbs |
| Baltimore Aircoil Co | 5.4K lbs |
| Nutra Blend LLC | 4.7K lbs |
| Moore Quality Galvanizing | 284 lbs |
| Evapco - Madera | 0 lbs |
Frequently Asked Questions
What does EPA SDWIS list for drinking water in Madera, California? ▼
How many water violations does Madera have in this EPA extract? ▼
What contaminants were found in Madera water? ▼
How many water systems serve Madera? ▼
Where does Madera get its drinking water? ▼
Are there pollution sources near Madera? ▼
How does Madera compare in California?
Of the 909 California places with at least one community water system on file, Madera ranks #8 by number of systems (31).
Either side of it: Fresno (42), Santa Rosa (41), Chico (28), Bishop (24)
About This Data
Figures here are the current EPA SDWIS extract joined to the 31 community water systems whose service area lists Madera, 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.