Is Turlock, CA tap water safe?
The short answer
2 of the 3 utilities serving Turlock 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 Turlock and Country Club County WD.
City of Turlock, which serves the most people here, has 3 results above the health goal. The worst: Arsenic at 8.2 ppb, above the health goal. Health goals are stricter than legal limits and are not enforced.
The water from City of Turlock is moderately hard to hard depending on the source, 64 to 152 mg/L (3.7 to 8.9 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 Turlock’s ZIP codes, from EPA’s estimates.
- Open report
City of Turlock
California · serves 72,888 people · about 21,600 in Turlock
3 results above the health goal. The worst: Arsenic at 8.2 ppb, above the health goal. Hardness: moderately hard to hard depending on the source, 64 to 152 mg/L (3.7 to 8.9 grains per gallon).
1 health-based violation since 2016
- Open report
City of Modesto - South Turlock
California · serves 1,109 people · about 130 in Turlock
2 results above the health goal. The worst: Arsenic at 8.0 ppb, above the health goal. Hardness: moderately hard to hard depending on the source, 81 to 138 mg/L (4.7 to 8.1 grains per gallon).
No health-based violations since 2016
- Open report
Country Club County WD
California · serves 64 people · under 100 in Turlock
2 results above the health goal. The worst: Arsenic at 6.0 ppb, above the health goal. Hardness: moderately hard, 79 mg/L (4.6 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 Turlock’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 Turlock
The 3 labs California certifies closest to Turlock, 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 1 mile
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, radioactivity
Certified Laboratories - Turlock
Turlock, CA · about 2 miles
Certified for bacteria
Aemtek, Inc.
Modesto, CA · about 16 miles
Certified for bacteria
Which ZIP codes are in Turlock: 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 Turlock
Other towns in Merced County with a page of their own.
What to do next
- Read City of Turlock’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