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City water profile

San Bernardino water quality

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

Median indexed hardness

185PPM

9 indexed ZIPs

Range 182–186.5 PPM

State comparison
4 PPM below
State hardness rank
#138 of 242
Matched utilities
1
Active health records
0

City summary

What the indexed records say

San Bernardino has 9 published ZIP profiles across San Bernardino County. The indexed median is 185 PPM, compared with 189 PPM across California.

Among the 242 Californiacities with an indexed median, San Bernardino ranks #138from highest to lowest. Across all 678 state ZIP profiles, available estimates run from 3.3to 728.5 PPM.

The 182–186.5 PPM range shows how much the available ZIP estimates vary within the city label.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs
Moderately hard0 ZIPs
Hard0 ZIPs
Very hard9 ZIPs

9 of 9 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
1.5 miles
Profiles with evidence
9/9

Confidence labels

High: 0Moderate: 9Low: 0

Observation window: Jan 11, 2016 to May 13, 2026.

ZIP directory

Water reports in San Bernardino

Open a ZIP for site-level provenance and measurements.

ZIP code

92369

Very Hard

182 PPM

Nearest site
2.2 mi
Confidence
Moderate

View full ZIP evidence →

ZIP code

92401

Very Hard

185 PPM

Nearest site
0.3 mi
Confidence
Moderate

View full ZIP evidence →

ZIP code

92404

Very Hard

184 PPM

Nearest site
2.3 mi
Confidence
Moderate

View full ZIP evidence →

ZIP code

92405

Very Hard

186.5 PPM

Nearest site
1.5 mi
Confidence
Moderate

View full ZIP evidence →

ZIP code

92407

Very Hard

186.5 PPM

Nearest site
4.3 mi
Confidence
Moderate

View full ZIP evidence →

ZIP code

92408

Very Hard

185 PPM

Nearest site
0.7 mi
Confidence
Moderate

View full ZIP evidence →

ZIP code

92410

Very Hard

185 PPM

Nearest site
0.8 mi
Confidence
Moderate

View full ZIP evidence →

ZIP code

92411

Very Hard

186.5 PPM

Nearest site
2.3 mi
Confidence
Moderate

View full ZIP evidence →

ZIP code

92415

Very Hard

185 PPM

Nearest site
0.1 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

San Bernardino City

PWSID CA3610039

Groundwater
System population served
214,665
Last reported
Jun 22, 2026

A municipal system, in-state city, and served county all agree with this Census ZCTA.

Compliance history

What EPA records show

No active health-based violation appears among the associated systems in the represented EPA reporting quarter. This does not mean every contaminant was tested at every tap.

No violation records are included in the current lookback window.

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 San Bernardino

Is the water hard?

The indexed city median is 185 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.