Is Los Angeles tap water safe to drink?

Yes but with caveats

Los Angeles's water meets EPA minimum standards but has some concerns including PFAS detected. Filtration is recommended for sensitive individuals.

69/100
Purity Score
3
Issues Found
7 GPG
Hardness
Detected
PFAS

3 Issues Detected in Los Angeles

PFAS (Forever Chemicals) Detected

PFAS are man-made chemicals that do not break down and accumulate in the body.

PFAS details for Los Angeles

Moderately Hard Water (7 GPG)

Hardness above 7 GPG can cause minor scale buildup.

Hardness data for Los Angeles

Arsenic Approaching Limit (0.4 mg/L)

EPA limit is 0.010 mg/L.

Arsenic info for Los Angeles
California

900,019,000,290,003 · Colorado River Owens Valley local groundwater

Los Angeles, CA Water Quality Report

Moderate Risk Updated March 2026 4.0M residents
See Best Filters for Los Angeles
69
Purity Score

Contaminant Levels

PFAS
4.1 ppt
Lead
5 ppb
Nitrate
0.6 mg/L
Arsenic
0.4 mg/L
Hardness
7 gpg

Health Insights

  • 1
    At 7 GPG, Los Angeles's water qualifies as moderately hard. This can cause limescale in pipes and shorten appliance lifespan.
  • 2
    PFAS have been identified in Los Angeles's water at 4.1 parts per trillion. A reverse osmosis system is the most reliable home treatment.

Score

69 /100
Moderate
"Good" threshold (70)

Los Angeles tap water is sourced from Colorado River Owens Valley local groundwater and treated by LA Dept of Water and Power. PFAS forever chemicals have been detected. Overall purity score: 69/100 (Moderate). Updated for 2026.

Fix Your Water

Best filters matched to Los Angeles's 3 issues.

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Explore Los Angeles Water Data

PFAS in Los AngelesForever chemicals
Lead in Los AngelesLead risk
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Los Angeles Water FAQ

Is Los Angeles CA tap water safe to drink in 2026?
Los Angeles tap water meets EPA federal drinking water standards and scores 69/100 (Moderate) on PurityMap for 2026. PFAS forever chemicals have been detected at 4.1 ppt. An NSF-certified filter is strongly recommended. For most healthy adults the water is considered safe but point-of-use filtration adds an important layer of protection.
Does Los Angeles CA use chlorine or chloramine for disinfection?
Los Angeles uses chloramine as the primary disinfectant with a residual level of 0.8 ppm. Chloramine is harder to remove than free chlorine and requires a catalytic carbon or reverse osmosis filter. Standard Brita-style pitchers will NOT remove chloramine.
How hard is Los Angeles CA water and what is the TDS level?
Los Angeles water hardness is 7.0 grains per gallon (moderate) with a TDS of 330 ppm (poor). This level is unlikely to cause significant scale buildup in household plumbing.
Has PFAS been found in Los Angeles CA drinking water?
Yes. PFAS forever chemicals have been detected in Los Angeles water at approximately 4.1 ppt according to EPA UCMR5 monitoring data. A reverse osmosis or NSF P473-certified filter is the most effective residential solution.
What is the best water filter for Los Angeles?
Based on Los Angeles's water profile, we recommend the Clearly Filtered Water Pitcher. Los Angeles: PFAS detected or elevated lead risk. Reverse osmosis is the only residential technology proven to reduce both below detection limits. TDS will also drop significantly.

Nearby Reports

BakersfieldCalifornia — 55/100RiversideCalifornia — 58/100San BernardinoCalifornia — 58/100Moreno ValleyCalifornia — 58/100FontanaCalifornia — 58/100Chula VistaCalifornia — 61/100

All California cities

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Data Sources

  • EPA SDWIS
  • EWG Tap Water Database
  • LA Dept of Water and Power CCR
  • USGS monitoring data

PurityMap compiles public data. Updated March 2026.

© 2026 PurityMap. For informational purposes only.

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