Is Los Banos, CA tap water safe?
The short answer
2 of the 2 utilities serving Los Banos have a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and California’s records: City of Los Banos and Volta Community SD.
City of Los Banos, which serves the most people here, has 1 result above the limit’s level with no violation recorded, 2 results above the health goal and 1 result above EPA’s health benchmark. The worst: Uranium at 33.8 ppb, above the limit’s level, no violation. Health goals are stricter than legal limits and are not enforced.
The water from City of Los Banos is very hard, typically 275 mg/L (16.1 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 Los Banos’s ZIP codes, from EPA’s estimates.
- Open report
City of Los Banos
California · serves 48,896 people · about 1,200 in Los Banos
1 result above the limit’s level with no violation recorded, 2 results above the health goal and 1 result above EPA’s health benchmark. The worst: Uranium at 33.8 ppb, above the limit’s level, no violation. Hardness: very hard, typically 275 mg/L (16.1 grains per gallon).
1 health-based violation since 2016
- Open report
Volta Community SD
California · serves 366 people · under 100 in Los Banos
Nothing in its records is above a health goal. Hardness: very hard, 190 mg/L (11.1 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 Los Banos’s water, which serves the most people here. Another utility’s report names what handles its own results.
Disclosure: TapBuff earns a commission if you buy through some links on this page. It does not change which standard or filter we name. As an Amazon Associate, TapBuff earns from qualifying purchases. How TapBuff makes money
Countertop reverse osmosis
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 4, 2026
Certified for: 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: Nitrate, 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
Water testing near Los Banos
The 3 labs California certifies closest to Los Banos, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Certified Laboratories - Turlock
Turlock, CA · about 29 miles
Certified for bacteria
Microbac Laboratories, Inc. - Turlock
Turlock, CA · about 30 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, radioactivity
CM Analytical, Inc.
Gilroy, CA · about 40 miles
Certified for bacteria
ZIP codes in Los Banos
Which ZIP codes are in Los Banos: 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 Los Banos
Other towns in Merced County with a page of their own.
What to do next
- Read City of Los Banos’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- About UraniumWhat it does to health, where it comes from, and the certification claim that addresses it.About Uranium
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water