Is Shafter, CA tap water safe?
The short answer
1 of the 4 utilities serving Shafter has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and California’s records: Oildale MWC.
City of Shafter, which serves the most people here, has 2 results above the health goal. The worst: Nitrate at 11.3 ppm, above the health goal. Health goals are stricter than legal limits and are not enforced.
The water from City of Shafter is soft to very hard depending on the source, 17 to 205 mg/L (1 to 12 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 Shafter’s ZIP codes, from EPA’s estimates.
- Open report
City of Shafter
California · serves 21,915 people · about 7,600 in Shafter
2 results above the health goal. The worst: Nitrate at 11.3 ppm, above the health goal. Hardness: soft to very hard depending on the source, 17 to 205 mg/L (1 to 12 grains per gallon).
No health-based violations since 2016
- Open report
Oildale MWC
California · serves 45,315 people · about 820 in Shafter
2 results above the legal limit and 1 result above the health goal. The worst: Haloacetic acids (HAA5) at 54.7 ppb, above the legal limit. Hardness: moderately hard to hard depending on the source, 70 to 180 mg/L (4.1 to 10.5 grains per gallon).
5 health-based violations since 2016
- Open report
Cws - North Garden
California · serves 27,634 people · about 100 in Shafter
1 result above EPA’s new limit, which takes effect in 2029, 3 results above the health goal and 1 result above EPA’s health benchmark. The worst: PFOS at 4.6 ppt, above EPA’s new limit, which takes effect in 2029. Hardness: soft to very hard depending on the source, 41 to 230 mg/L (2.4 to 13.5 grains per gallon).
No health-based violations since 2016
- Open report
Llanas Camp Four Water System
California · serves 54 people · nearly all in Shafter
1 result above the health goal. The worst: Arsenic at 3.3 ppb, above the health goal. Hardness: moderately hard, 82 mg/L (4.8 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 City of Shafter’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: 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: Nitrate, Arsenic
Culligan 10-Cup Pitcher with ZeroWater Technology (ZEROP10)
Pitcher
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 9, 2026
Certified for: Nitrate
Water testing near Shafter
The 3 labs California certifies closest to Shafter, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Pace Analytical Services, LLC dba BC Laboratories, Inc.
Bakersfield, CA · about 11 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, radioactivity
Zalco Laboratories, Inc.
Bakersfield, CA · about 11 miles
Certified for bacteria, nitrate, metals, minerals and other inorganics, organic chemicals, disinfection byproducts
BSK Associates - Bakersfield Analytical Laboratory
Bakersfield, CA · about 12 miles
Certified for bacteria
Which ZIP codes are in Shafter: 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 Shafter
Other towns in Kern County with a page of their own.
What to do next
- Read City of Shafter’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- Filters for NitrateRanked 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