Water Quality Report · Updated October 07, 2026
CITY OF MADERA
CITY OF MADERA delivers tap water graded B (79/100) by TapWaterSafety.org. The utility serves approximately 66,560 residents in MADERA, California using groundwater. The most significant water quality concerns are: Haloacetic acids (HAA5) significantly above health guideline; Arsenic significantly above health guideline; Chromium (hexavalent) significantly above health guideline. For questions, the utility can be reached at 559-661-5466.
Is MADERA tap water safe to drink?
CITY OF MADERA delivers tap water that earns a grade of B (79/100) from TapWaterSafety.org — a good rating, with only minor concerns relative to health-based guidelines.
The utility serves 66,560 residents in MADERA, drawing from groundwater.
Public testing data identifies 10 contaminants in this water above EWG's health-based guidelines, including: Haloacetic acids (HAA5), Arsenic, Chromium (hexavalent), Nitrate, 1,2-Dibromo-3-chloropropane (DBCP), Total trihalomethanes (TTHMs), Tetrachloroethylene (perchloroethylene), Radium, combined (-226 and -228), Bromoform, Vanadium. For most residents, a properly certified home filter at the kitchen tap is the most cost-effective way to reduce exposure to whatever's in your water. See our filter recommendations below, matched specifically to this utility's contaminant profile.
EPA compliance record
Official U.S. EPA records for CITY OF MADERA (system ID CA2010002) for the last 3 years. Checked 2026-10-07.
Source: U.S. EPA Enforcement and Compliance History Online (ECHO), from the Safe Drinking Water Information System. See EPA's full report.
Quick actions for MADERA residents
Top concerns in this water
Based on the most recent EPA and EWG data, these are the most significant water quality issues for CITY OF MADERA.
Haloacetic acids (HAA5) significantly above health guideline
Moderate concernHaloacetic acids (HAA5) detected at 36.2 ppb, 362x above the EWG health guideline of 0.1 ppb.
Arsenic significantly above health guideline
Moderate concernArsenic detected at 1.14 ppb, 285x above the EWG health guideline of 0.004 ppb.
Chromium (hexavalent) significantly above health guideline
Moderate concernChromium (hexavalent) detected at 1.54 ppb, 77x above the EWG health guideline of 0.02 ppb.
Contact CITY OF MADERA
Reach the utility directly for service issues, water quality concerns, or to request your Consumer Confidence Report.
General Contact
Treatment Plant
Recommended water filters for MADERA
Filters matched to the specific contaminants in this water supply.
Carbon filter certified for VOCs (NSF/ANSI 53)
$180-$599Activated carbon is effective for disinfection byproducts. Look for NSF/ANSI 53 VOC reduction.
Reverse osmosis certified for arsenic (NSF/ANSI 58)
$429-$599Reverse osmosis certified under NSF/ANSI 58 for arsenic is the most reliable home option.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
Score breakdown
This utility's overall score of 79/100 breaks down across five weighted components. Read the full methodology →
Contaminants detected — international standards comparison
Every contaminant detected, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal (the strictest US benchmark). Why we show multiple standards →
| Contaminant | Detected | EWG US health-based |
EPA US legal |
EU DWD Europe |
WHO global |
CA PHG strictest US |
Tested sample year |
Status |
|---|---|---|---|---|---|---|---|---|
| Haloacetic acids (HAA5) Disinfection byproduct |
36.2 ppb | 0.1 | 60.0 | 60 | — | — | — | 362× over |
| Arsenic Heavy metal |
1.14 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 285× over |
| Chromium (hexavalent) Heavy metal |
1.54 ppb | 0.02 | — | — | — | — | — | 77× over |
| Nitrate Inorganic |
1.79 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 13× over |
| 1,2-Dibromo-3-chloropropane (DBCP) Other |
0.0163 ppb | 0.0017 | 0.2 | — | — | — | — | 9.6× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
0.597 ppb | 0.15 | 80.0 | 100 | — | — | — | 4.0× over |
| Tetrachloroethylene (perchloroethylene) Volatile organic compound |
0.233 ppb | 0.06 | 5.0 | — | — | — | — | 3.9× over |
| Radium, combined (-226 and -228) Radiological |
0.12 pCi/L | 0.05 | 5.0 | — | — | — | — | 2.4× over |
| Bromoform Disinfection byproduct |
0.597 ppb | 0.5 | — | — | — | — | — | 1.2× over |
| Vanadium Other |
21.5 ppb | 21.0 | — | — | — | — | — | 1.0× over |
| Molybdenum Other |
2.8 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Chlorate Disinfection byproduct |
8.84 ppb | 210.0 | — | — | — | — | — | Below guideline |
| 1,4-Dioxane Semi-volatile organic compound |
0.0138 ppb | 0.35 | — | — | 50 | 1 | — | Below guideline |
| Barium Heavy metal |
18.4 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Manganese Heavy metal |
2.34 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Strontium Radiological |
0.208 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.0843 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
All values in the unit of the detected level. Red cells indicate the detected level exceeds that standard. Some contaminants have limits in some jurisdictions but not others (shown as —). The "Tested" column shows the year each contaminant sample was collected.
Sources: US EPA, EU Drinking Water Directive 2020/2184, WHO Guidelines (4th ed.), California OEHHA PHGs, EWG Tap Water Database.
CITY OF MADERA service area
This water system serves 1 community in Madera County, California. Click any city for its dedicated tap water quality page.
Find the right filter for MADERA water
Browse filter categories by water-quality concern. Each option below is NSF-certified for the matched contaminant type.