Is Del Aire, CA tap water safe?
The short answer
1 of the 3 utilities serving Del Aire has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and California’s records: Los Angeles - City, Dept. of Water & Power.
Gswc - Southwest, which serves the most people here, has 3 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 51.3 ppb, above EPA’s health benchmark. Health goals are stricter than legal limits and are not enforced.
The water from Gswc - Southwest is moderately hard to very hard depending on the source, 120 to 280 mg/L (7 to 16.4 grains per gallon). How California’s water compares.
A town can be served by more than one utility, and some homes are on private wells. The name on your water bill tells you which is yours, and your ZIP code narrows it down. They are listed by how many people each serves in Del Aire’s ZIP codes, from EPA’s estimates.
- Open report
Gswc - Southwest
California · serves 277,740 people · about 8,800 in Del Aire
3 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 51.3 ppb, above EPA’s health benchmark. Hardness: moderately hard to very hard depending on the source, 120 to 280 mg/L (7 to 16.4 grains per gallon).
No health-based violations since 2016
- Open report
Hawthorne - City Water Dept.
California · serves 46,039 people · about 4,900 in Del Aire
2 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 26.8 ppb, above EPA’s health benchmark. Hardness: hard to very hard depending on the source, 171 to 255 mg/L (10 to 14.9 grains per gallon).
No health-based violations since 2016
- Open report
Los Angeles - City, Dept. of Water & Power
California · serves 3.9 million people · about 200 in Del Aire
4 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 100 ppb, above EPA’s health benchmark. Hardness: moderately hard to very hard depending on the source, 94 to 544 mg/L (5.5 to 31.8 grains per gallon).
2 health-based violations since 2016
What handles it
Each of these is certified, on a certifier’s listing, for a result above a line in Gswc - Southwest’s water, which serves the most people here. Another utility’s report names what handles its own results.
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Aquasana SmartFlow Reverse Osmosis (AQ-SFRO2)
Under-sink reverse osmosis
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 9, 2026
Certified for: Lead, Arsenic
Brondell Capella RC250 Reverse Osmosis System
Under-sink reverse osmosis
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 9, 2026
Certified for: Lead, Arsenic
Water testing near Del Aire
The 3 labs California certifies closest to Del Aire, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
EMAX Laboratories, Inc.
Torrance, CA · about 8 miles
Certified for nitrate, minerals and other inorganics, organic chemicals, disinfection byproducts
Positive Lab Service
Los Angeles, CA · about 9 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts
JK BioScience Inc.
Rancho Dominguez, CA · about 10 miles
Certified for bacteria, lead and copper, metals
Which ZIP codes are in Del Aire: Census 2020 relationship files. Which utilities serve them, and how many people: EPA SDWIS and EPA’s service area map. Each utility’s results: EPA UCMR 5, EPA SDWIS, and EPA’s and the state’s compliance monitoring, as its report lists them. How they are measured: methodology. Certified labs: California State Water Resources Control Board, ELAP accredited laboratories and their fields of accreditation; distances from the Census 2020 ZIP code tabulation area gazetteer.
Near Del Aire
Other towns in Los Angeles County with a page of their own.
What to do next
- Read Gswc - Southwest’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- About LithiumWhat it does to health, where it comes from, and the certification claim that addresses it.About Lithium
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water