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City water profile

Madera water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Madera, California.

Median indexed hardness

180PPM

One indexed ZIP

Range 179.5–179.5 PPM

State comparison
9 PPM below
State hardness rank
#177 of 242
Matched utilities
3
Active health records
1

City summary

What the indexed records say

Madera has 1 published ZIP profile across Madera County. The indexed median is 180 PPM, compared with 189 PPM across California.

Among the 242 Californiacities with an indexed median, Madera ranks #177from highest to lowest. Across all 678 state ZIP profiles, available estimates run from 3.3to 728.5 PPM.

Because only one ZIP is represented, the city median and range are the same local estimate. It should not be read as multiple independent samples across the community.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs
Moderately hard0 ZIPs
Hard1 ZIP
Very hard0 ZIPs

1 of 1 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
4.4 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 1Low: 0

Observation window: Feb 8, 2016 to Aug 13, 2025.

ZIP directory

Water reports in Madera

Open a ZIP for site-level provenance and measurements.

ZIP code

93637

Hard

179.5 PPM

Nearest site
4.4 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

City Of Madera

PWSID CA2010002

Groundwater
System population served
66,560
Last reported
Jun 22, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Riverstone/rootcreek Water District

PWSID CA2010016

Groundwater
System population served
5,507
Last reported
Jun 22, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Madera Co Csa 22c Gunner Ranch

PWSID CA2010019

Groundwater
System population served
3,050
Last reported
Jun 22, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Compliance history

What EPA records show

1 unique active health-based record appears among associated systems. This does not mean every contaminant was tested at every tap.

RecordSystemPeriodStatus
LEAD AND COPPER RULE REVISIONSCA2010016Oct 17, 2024Unaddressed · health-based
LEAD AND COPPER RULE REVISIONSCA2010016Oct 17, 2024Unaddressed

Practical next steps

Move from index to evidence

  1. 1. Open your ZIP. Check distance, dates, confidence, and the associated utility.
  2. 2. Read the current CCR. Confirm source water, detections, limits, ranges, and notices.
  3. 3. Test the tap when needed. Confirm health concerns or treatment sizing with the right method.

Questions people ask

About water in Madera

Is the water hard?

The indexed city median is 180 PPM. Open the ZIP report to verify the distance and confidence behind that estimate.

Is the tap water safe?

Compliance history is utility-wide and cannot guarantee conditions at every tap. Check current notices and test when address-specific evidence is needed.

Do I need treatment?

Choose treatment only after confirming the problem at the property. A softener targets hardness; contaminant treatment requires a matching, verified performance claim.