Is Apple Valley, CA tap water safe?
The short answer
5 of the 15 utilities serving Apple Valley have a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and California’s records: Thunderbird CWD, Apple Valley Heights CWD, Apple Valley Foothill CWD and 2 more.
Liberty Utilities (Av Ranchos) Corp., 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 32 ppb, above EPA’s health benchmark. Health goals are stricter than legal limits and are not enforced.
The water from Liberty Utilities (Av Ranchos) Corp. is soft to very hard depending on the source, 31 to 260 mg/L (1.8 to 15.2 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 Apple Valley’s ZIP codes, from EPA’s estimates.
- Open report
Liberty Utilities (Av Ranchos) Corp.
California · serves 63,381 people · about 16,600 in Apple Valley
3 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 32 ppb, above EPA’s health benchmark. Hardness: soft to very hard depending on the source, 31 to 260 mg/L (1.8 to 15.2 grains per gallon).
No health-based violations since 2016
- Open report
Golden State Water Co - Apple Vly South
California · serves 6,247 people · about 1,400 in Apple Valley
1 result above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 21.6 ppb, above EPA’s health benchmark. Hardness: moderately hard to very hard depending on the source, 70 to 220 mg/L (4.1 to 12.9 grains per gallon).
No health-based violations since 2016
- Open report
Golden State Water Co - Apple Vly North
California · serves 2,097 people · about 640 in Apple Valley
2 results above the health goal. The worst: Uranium at 9.5 ppb, above the health goal. Hardness: hard to very hard depending on the source, 130 to 190 mg/L (7.6 to 11.1 grains per gallon).
No health-based violations since 2016
- Open report
Mariana Ranchos CWD
California · serves 1,502 people · about 380 in Apple Valley
Nothing in its records is above a health goal. Hardness: moderately hard to hard depending on the source, 61 to 140 mg/L (3.6 to 8.2 grains per gallon).
No health-based violations since 2016
- Open report
Thunderbird CWD
California · serves 1,056 people · about 260 in Apple Valley
1 result above the legal limit and 2 results above the health goal. The worst: Nitrate at 11 ppm, above the legal limit. Hardness: hard to very hard depending on the source, 160 to 260 mg/L (9.4 to 15.2 grains per gallon).
1 health-based violation since 2016
- Open report
Navajo MWC
California · serves 264 people · about 230 in Apple Valley
1 result above the health goal. The worst: Uranium at 9.1 ppb, above the health goal. Hardness: very hard, 230 mg/L (13.5 grains per gallon).
No health-based violations since 2016
- Open report
Sbdno County Service Area 64
California · serves 14,955 people · about 220 in Apple Valley
1 result above the health goal. The worst: Uranium at 2.1 ppb, above the health goal. Hardness: moderately hard to hard depending on the source, 76 to 130 mg/L (4.4 to 7.6 grains per gallon).
No health-based violations since 2016
- Open report
Apple Valley Heights CWD
California · serves 983 people · about 170 in Apple Valley
Nothing in its records is above a health goal. Hardness: very hard, typically 263 mg/L (15.4 grains per gallon).
1 health-based violation since 2016
- Open report
Apple Valley Foothill CWD
California · serves 841 people · about 110 in Apple Valley
2 results above the health goal. The worst: Arsenic at 2.3 ppb, above the health goal. Hardness: hard to very hard depending on the source, 150 to 210 mg/L (8.8 to 12.3 grains per gallon).
1 health-based violation since 2016
- Open report
Juniper Riviera CWD
California · serves 858 people · under 100 in Apple Valley
2 results above the limit’s level with no violation recorded and 1 result above the health goal. The worst: Arsenic at 14 ppb, above the limit’s level, no violation. Hardness: soft to moderately hard depending on the source, 58 to 110 mg/L (3.4 to 6.4 grains per gallon).
3 health-based violations since 2016
5 more utilities in Apple Valley
By EPA’s estimate, each serves fewer people in Apple Valley than those above.
- Rancheritos MWCserves 487 people · under 100 in Apple Valley · no health-based violations since 2016
- Bear Valley MHPserves 150 people · under 100 in Apple Valley · no health-based violations since 2016
- Apple Valley View MWCserves 303 people · under 100 in Apple Valley · 6 health-based violations since 2016
- Golden State Water Desert Viewserves 120 people · under 100 in Apple Valley · no health-based violations since 2016
- Rancheritos #2serves 291 people · based in Apple Valley · no 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 Liberty Utilities (Av Ranchos) Corp.’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: Arsenic, Lead
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: Arsenic, Lead
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: Arsenic, Lead
Water testing near Apple Valley
The 3 labs California certifies closest to Apple Valley, 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 9 miles
Certified for bacteria
BSK Associates - San Bernardino Analytical Laboratory
San Bernardino, CA · about 31 miles
Certified for bacteria
Clinical Laboratory of San Bernardino, Inc.
Grand Terrace, CA · about 34 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, radioactivity
Which ZIP codes are in Apple Valley: 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 Apple Valley
Other towns in San Bernardino County with a page of their own.
What to do next
- Read Liberty Utilities (Av Ranchos) Corp.’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