Is Adelanto, CA tap water safe?
The short answer
1 of the 3 utilities serving Adelanto has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and California’s records: Chamisal MWC.
City of Adelanto, which serves the most people here, has 1 result above EPA’s new limit, which takes effect in 2029 and 3 results above the health goal. The worst: PFOS at 4.5 ppt, above EPA’s new limit, which takes effect in 2029.
The water from City of Adelanto is soft to very hard depending on the source, 24 to 210 mg/L (1.4 to 12.3 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 Adelanto’s ZIP codes, from EPA’s estimates.
- Open report
City of Adelanto
California · serves 39,930 people · about 2,200 in Adelanto
1 result above EPA’s new limit, which takes effect in 2029 and 3 results above the health goal. The worst: PFOS at 4.5 ppt, above EPA’s new limit, which takes effect in 2029. Hardness: soft to very hard depending on the source, 24 to 210 mg/L (1.4 to 12.3 grains per gallon).
No health-based violations since 2016
- Open report
High Desert Detention Center
California · serves 1,400 people · about 260 in Adelanto
1 result above the health goal. The worst: Arsenic at 9.2 ppb, above the health goal.
No health-based violations since 2016
- Open report
Chamisal MWC
California · serves 84 people · under 100 in Adelanto
1 result above the health goal. The worst: Uranium at 2.2 ppb, above the health goal. Hardness: hard, 165 mg/L (9.6 grains per gallon).
1 health-based violation since 2016
What handles it
Each of these is certified, on a certifier’s listing, for a result above a line in City of Adelanto’s water, which serves the most people here. Another utility’s report names what handles its own results.
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Countertop reverse osmosis
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 4, 2026
Certified for: PFOS, Nitrate, Arsenic
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: PFOS, Nitrate, 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: PFOS, Arsenic
Water testing near Adelanto
The 3 labs California certifies closest to Adelanto, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Geo-Monitor, Inc
Hesperia, CA · about 13 miles
Certified for bacteria
BSK Associates - San Bernardino Analytical Laboratory
San Bernardino, CA · about 38 miles
Certified for bacteria
A & R Laboratories, Inc.
Ontario, CA · about 39 miles
Certified for bacteria
ZIP codes in Adelanto
Which ZIP codes are in Adelanto: 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 Adelanto
Other towns in San Bernardino County with a page of their own.
What to do next
- Read City of Adelanto’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- Filters for PFOSRanked by certification and what they cost over five years.The best water filters for PFAS, ranked
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water