Is Hughson, CA tap water safe?
The short answer
2 of the 2 utilities serving Hughson 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 Hughson and Cobles Corner.
City of Hughson, which serves the most people here, has 1 result above the legal limit and 1 result above the health goal. The worst: Arsenic at 14.4 ppb, above the legal limit.
The water from City of Hughson is soft to hard depending on the source, 50 to 177 mg/L (2.9 to 10.4 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 Hughson’s ZIP codes, from EPA’s estimates.
- Open report
City of Hughson
California · serves 7,977 people · about 540 in Hughson
1 result above the legal limit and 1 result above the health goal. The worst: Arsenic at 14.4 ppb, above the legal limit. Hardness: soft to hard depending on the source, 50 to 177 mg/L (2.9 to 10.4 grains per gallon).
41 health-based violations since 2016
- Open report
Cobles Corner
California · serves 50 people · under 100 in Hughson
1 result above the legal limit. The worst: Arsenic at 11.9 ppb, above the legal limit. Hardness: soft, 54 mg/L (3.2 grains per gallon).
36 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 City of Hughson’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
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
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
Water testing near Hughson
The 3 labs California certifies closest to Hughson, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Microbac Laboratories, Inc. - Turlock
Turlock, CA · about 6 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, radioactivity
Certified Laboratories - Turlock
Turlock, CA · about 7 miles
Certified for bacteria
Aemtek, Inc.
Modesto, CA · about 11 miles
Certified for bacteria
ZIP codes in Hughson
Which ZIP codes are in Hughson: 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 Hughson
Other towns in Stanislaus County with a page of their own.
What to do next
- Read City of Hughson’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- Filters for ArsenicRanked 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