Is Cressey, CA tap water safe?
The short answer
2 of the 2 utilities serving Cressey have a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and California’s records: Winton Water & Sanitary Dist and City of Livingston.
Winton Water & Sanitary Dist, which serves the most people here, has 1 result above the health goal. The worst: Arsenic at 3.6 ppb, above the health goal. Health goals are stricter than legal limits and are not enforced.
The water from Winton Water & Sanitary Dist is soft to moderately hard depending on the source, 52 to 87 mg/L (3 to 5.1 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 Cressey’s ZIP codes, from EPA’s estimates.
- Open report
Winton Water & Sanitary Dist
California · serves 9,745 people · about 190 in Cressey
1 result above the health goal. The worst: Arsenic at 3.6 ppb, above the health goal. Hardness: soft to moderately hard depending on the source, 52 to 87 mg/L (3 to 5.1 grains per gallon).
1 health-based violation since 2016
- Open report
City of Livingston
California · serves 14,894 people · under 100 in Cressey
3 results above the health goal. The worst: Nitrate at 11 ppm, above the health goal. Hardness: soft to hard depending on the source, 47 to 155 mg/L (2.7 to 9.1 grains per gallon).
2 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 Winton Water & Sanitary Dist’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 Cressey
The 3 labs California certifies closest to Cressey, 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 14 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, radioactivity
Certified Laboratories - Turlock
Turlock, CA · about 14 miles
Certified for bacteria
Aemtek, Inc.
Modesto, CA · about 28 miles
Certified for bacteria
Which ZIP codes are in Cressey: 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 Cressey
Other towns in Merced County with a page of their own.
What to do next
- Read Winton Water & Sanitary Dist’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