Madera Water Quality

California

Health Violations

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.

31
Water Systems
88,940
Population Served
484
Health-Based Violation Records
10
Distinct Contaminant Codes

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?
Madera is listed with 31 EPA-regulated water systems covering approximately 88,940 people. 484 health-based violation records appear in the extract. A past registry row is not a current drinkability verdict; contact the local utility for current status.
How many water violations does Madera have in this EPA extract?
Madera water systems have 484 health-based violation records in PlainEnviro's EPA SDWIS extract. This extract is filtered to EPA health-based records and does not include monitoring or reporting violations.
What contaminants were found in Madera water?
Health-based records for Madera water systems carry the following EPA contaminant codes: TTHM, Total Haloacetic Acids (HAA5), Arsenic, Combined Uranium, Surface Water Treatment Rule and 5 others. This source edition does not include authoritative contaminant names. Source: EPA SDWIS.
How many water systems serve Madera?
31 EPA-regulated community water systems serve Madera, California, collectively covering approximately 88,940 people. Data is from the EPA Safe Drinking Water Information System (SDWIS).
Where does Madera get its drinking water?
Madera's water supply comes from 31 EPA-regulated community water systems. Source type data is not available for all systems. For detailed supply information, contact your local water utility. Source: EPA SDWIS.
Are there pollution sources near Madera?
Yes, 9 EPA Toxic Release Inventory (TRI) facilities are registered in Madera, California, reporting a combined 981.7K lbs of toxic chemical releases. TRI data reflects self-reported emissions; it does not measure exposure or health effects. Source: EPA TRI.

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.

Related

Data sourced from U.S. EPA environmental datasets. See our methodology for details. Retrieved and formatted by PlainEnviro