Is Fulton, CA tap water safe?
The short answer
Neither of the 2 utilities serving Fulton has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and California’s records.
California - American Larkfield (Puc), which serves the most people here, has 2 results above the health goal. The worst: Arsenic at 6.6 ppb, above the health goal. Health goals are stricter than legal limits and are not enforced.
The water from California - American Larkfield (Puc) is moderately hard to hard depending on the source, 100 to 160 mg/L (5.8 to 9.4 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 Fulton’s ZIP codes, from EPA’s estimates.
- Open report
California - American Larkfield (Puc)
California · serves 7,911 people · about 350 in Fulton
2 results above the health goal. The worst: Arsenic at 6.6 ppb, above the health goal. Hardness: moderately hard to hard depending on the source, 100 to 160 mg/L (5.8 to 9.4 grains per gallon).
No health-based violations since 2016
- Open report
City of Santa Rosa
California · serves 178,452 people · about 210 in Fulton
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: Arsenic at 13.4 ppb, above the limit’s level, no violation. Hardness: moderately hard to very hard depending on the source, 92 to 198 mg/L (5.4 to 11.6 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 California - American Larkfield (Puc)’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 Fulton
The 3 labs California certifies closest to Fulton, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
K Prime, LLC.
Santa Rosa, CA · about 2 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, PFAS
Sonoma County Public Health Laboratory
Santa Rosa, CA · about 4 miles
Certified for bacteria
Brelje and Race Laboratories, Inc.
Santa Rosa, CA · about 5 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts
Which ZIP codes are in Fulton: 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 Fulton
Other towns in Sonoma County with a page of their own.
What to do next
- Read California - American Larkfield (Puc)’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