Is Visalia, CA tap water safe?
The short answer
3 of the 9 utilities serving Visalia have a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and California’s records: Sunrise Mutual Water Co., Seville Water Company and Yettem Water System.
Cws - Visalia, which serves the most people here, has 2 results above EPA’s new limit, which takes effect in 2029 and 3 results above the health goal. The worst: PFOS at 6.9 ppt, above EPA’s new limit, which takes effect in 2029.
The water from Cws - Visalia is soft to very hard depending on the source, 20 to 200 mg/L (1.2 to 11.7 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 Visalia’s ZIP codes, from EPA’s estimates.
- Open report
Cws - Visalia
California · serves 153,522 people · about 30,700 in Visalia
2 results above EPA’s new limit, which takes effect in 2029 and 3 results above the health goal. The worst: PFOS at 6.9 ppt, above EPA’s new limit, which takes effect in 2029. Hardness: soft to very hard depending on the source, 20 to 200 mg/L (1.2 to 11.7 grains per gallon).
No health-based violations since 2016
- Open report
Patterson Tract CSD
California · serves 550 people · about 220 in Visalia
1 result above the health goal. The worst: Arsenic at 2.0 ppb, above the health goal. Hardness: moderately hard, typically 94 mg/L (5.5 grains per gallon).
No health-based violations since 2016
- Open report
The Lakes Association
California · serves 495 people · under 100 in Visalia
1 result above the health goal. The worst: Arsenic at 1.0 ppb, above the health goal. Hardness: moderately hard, typically 67 mg/L (3.9 grains per gallon).
No health-based violations since 2016
- Open report
Linnell Farm Labor Center
California · serves 694 people · under 100 in Visalia
1 result above the health goal. The worst: Uranium at 5.9 ppb, above the health goal. Hardness: hard, typically 136 mg/L (8 grains per gallon).
No health-based violations since 2016
- Open report
Sunrise Mutual Water Co.
California · serves 109 people · under 100 in Visalia
1 result above the health goal. The worst: Arsenic at 3.0 ppb, above the health goal. Hardness: soft to moderately hard depending on the source, 58 to 77 mg/L (3.4 to 4.5 grains per gallon).
1 health-based violation since 2016
- Open report
Seville Water Company
California · serves 691 people · under 100 in Visalia
1 result above the health goal. The worst: Arsenic at 1.6 ppb, above the health goal. Hardness: hard, typically 155 mg/L (9.1 grains per gallon).
1 health-based violation since 2016
- Open report
Bedel Mutual Water Company
California · serves 155 people · under 100 in Visalia
1 result above the health goal. The worst: Uranium at 1.8 ppb, above the health goal. Hardness: soft to moderately hard depending on the source, 58 to 95 mg/L (3.4 to 5.6 grains per gallon).
No health-based violations since 2016
- Open report
Yettem Water System
California · serves 350 people · under 100 in Visalia
2 results above the health goal. The worst: Nitrate at 13.7 ppm, above the health goal. Hardness: moderately hard, typically 108 mg/L (6.3 grains per gallon).
1 health-based violation since 2016
- Open report
Mountain View MHP
California · serves 44 people · under 100 in Visalia
1 result above the health goal. The worst: Uranium at 8.8 ppb, above the health goal. Hardness: hard, 121 mg/L (7.1 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 Cws - Visalia’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: PFOS, PFOA, 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: PFOS, PFOA, Nitrate, 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: PFOS, PFOA, Arsenic
Water testing near Visalia
The 3 labs California certifies closest to Visalia, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Fruit Growers Laboratory, Inc.
Visalia, CA · about 4 miles
Certified for bacteria
Sierra Dairy Laboratory
Tulare, CA · about 10 miles
Certified for bacteria
BSK Associates
Fresno, CA · about 33 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, PFAS, radioactivity
Which ZIP codes are in Visalia: 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 Visalia
Other towns in Tulare County with a page of their own.
What to do next
- Read Cws - Visalia’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- Filters for PFOSRanked by certification and what they cost over five years.The best water filters for PFAS, ranked
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water