City water profile

Water hardness in Los Angeles

Find official utility reports, understand hardness, and check the water system serving your home in Los Angeles, California.

Utility-reported hardness

Not yet available

Check your provider and source →

State comparison: 39 PPM above
Evidence comparison rank: #5 of 13
Matched utilities: 1
Active health records: 0

Your tap water

What does the utility report?

Match the utility name to your water bill. These results describe the utility’s water, not a test at your home. A ZIP can include several water systems.

Los Angeles Department of Water and Power

Hardness not yet transcribed

The official report is available below. Check its hardness table and the source or treatment zone serving you, or ask the utility for your result.

Read Official drinking water quality report hub ↗

Source checked Sep 29, 2026.

Convert a hardness result →Test your tap →

Match the name on your water bill

Your utility’s measurements and compliance records

These are possible serving systems. A record for one system does not apply to every home in this ZIP. Confirm your provider before interpreting a measurement or notice. Federal records can lag current utility notices.

EPA snapshot: 2026Q2. Historical window begins Jan 1, 2021.

Los Angeles-City, Dept. Of Water & Power

CA1910067 · Surface water · 3,875,566 people served system-wide

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

No active health-based record in this imported snapshot

Read Official drinking water quality report hub ↗

Measurements (1)

An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.

Lead (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Below action level

Reported level: 0.0039 mg/L
Action level: 0.015 mg/L

26% of the listed benchmark

Monitoring period: Jan 1, 2021 to Dec 31, 2023

Violation history (0)

No record returned in this imported window. This is not a guarantee of tap-water safety.

City summary

What the indexed records say

Los Angeles has 108 published ZIP profiles across Los Angeles County. The regional-evidence median is 254 PPM. Its comparison-eligible median is 254 PPM versus 215 PPM statewide.

Among the 13 Californiacities meeting the comparison standard, Los Angeles ranks #5from highest to lowest. Across all 678 state ZIP profiles, available estimates run from 65.8to 539.5 PPM.

The 192–1531.5 PPM range shows how much the available ZIP estimates vary within the city label. At least one estimate is marked low confidence, so observation distance and date deserve extra attention.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs

Moderately hard0 ZIPs

Hard0 ZIPs

Very hard85 ZIPs

85 of 108 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance: 16.3 miles
Profiles with evidence: 85/108

Confidence labels

High: 0Moderate: 83Low: 2

Observation window: Feb 13, 2020 to Apr 14, 2022.

ZIP directory

Water reports in Los Angeles

Open a ZIP for site-level provenance and measurements.

ZIP code

What does the utility report?

Los Angeles Department of Water and Power

Your utility’s measurements and compliance records

Los Angeles-City, Dept. Of Water & Power

Lead (90th percentile)

What the indexed records say

How local ZIP estimates compare

Distance, dates, and confidence

Water reports in Los Angeles

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