Is La Verne, CA tap water safe?
The short answer
1 of the 2 utilities serving La Verne has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and California’s records: La Verne, City WD.
La Verne, City WD, which serves the most people here, has 4 results above the health goal. The worst: Nitrate at 26 ppm, above the health goal. Health goals are stricter than legal limits and are not enforced.
The water from La Verne, City WD is moderately hard to very hard depending on the source, 115 to 430 mg/L (6.7 to 25.1 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 La Verne’s ZIP codes, from EPA’s estimates.
- Open report
La Verne, City WD
California · serves 31,334 people · about 4,700 in La Verne
4 results above the health goal. The worst: Nitrate at 26 ppm, above the health goal. Hardness: moderately hard to very hard depending on the source, 115 to 430 mg/L (6.7 to 25.1 grains per gallon).
1 health-based violation since 2016
- Open report
Gswc - San Dimas
California · serves 56,564 people · about 520 in La Verne
1 result above EPA’s new limit, which takes effect in 2029, 4 results above the health goal and 1 result above EPA’s health benchmark. The worst: PFOS at 4.6 ppt, above EPA’s new limit, which takes effect in 2029. Hardness: very hard, typically 299 mg/L (17.5 grains per gallon).
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 La Verne, City WD’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: Nitrate, Lead, 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: Nitrate, Lead, Arsenic
Culligan 10-Cup Pitcher with ZeroWater Technology (ZEROP10)
Pitcher
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 9, 2026
Certified for: Nitrate, Lead
Water testing near La Verne
The 3 labs California certifies closest to La Verne, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Eurofins Pomona
Pomona, CA · about 8 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, PFAS, radioactivity
Enviro-Chem, Inc.
Pomona, CA · about 10 miles
Certified for metals
A & R Laboratories, Inc.
Ontario, CA · about 12 miles
Certified for bacteria
ZIP codes in La Verne
Which ZIP codes are in La Verne: 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 La Verne
Other towns in Los Angeles County with a page of their own.
What to do next
- Read La Verne, City WD’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- Filters for NitrateRanked by certification and what they cost over five years.The best reverse osmosis systems, ranked
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water