Is Oildale, CA tap water safe?
The short answer
1 of the 3 utilities serving Oildale 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.
Oildale MWC, which serves the most people here, has 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.
The water from Oildale MWC is moderately hard to hard depending on the source, 70 to 180 mg/L (4.1 to 10.5 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 Oildale’s ZIP codes, from EPA’s estimates.
- Open report
Oildale MWC
California · serves 45,315 people · about 660 in Oildale
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 370 in Oildale
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
Lerdo Sheriff S Facility
California · serves 2,800 people · under 100 in Oildale
1 result above the health goal. The worst: Arsenic at 4.0 ppb, above the health goal. Hardness: soft, typically 11 mg/L (0.7 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 Oildale MWC’s water, which serves the most people here. Another utility’s report names what handles its own results.
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Aquasana Clean Water Machine (AQ-CWM2)
Countertop
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 9, 2026
Certified for: Total trihalomethanes (TTHM)
Brita Hub Countertop Water Filter System (87340)
Countertop
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 9, 2026
- IAPMO listing:NSF/ANSI 53checked Oct. 9, 2026
Certified for: Total trihalomethanes (TTHM)
Ninja HydraSense Countertop Water Filtration System (WF1001)
Countertop
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 9, 2026
Certified for: Total trihalomethanes (TTHM)
Water testing near Oildale
The 3 labs California certifies closest to Oildale, 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 21 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, radioactivity
Zalco Laboratories, Inc.
Bakersfield, CA · about 21 miles
Certified for bacteria, nitrate, metals, minerals and other inorganics, organic chemicals, disinfection byproducts
BSK Associates - Bakersfield Analytical Laboratory
Bakersfield, CA · about 25 miles
Certified for bacteria
ZIP codes in Oildale
Which ZIP codes are in Oildale: 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 Oildale
Other towns in Kern County with a page of their own.
What to do next
- Read Oildale MWC’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- About Haloacetic acids (HAA5)What it does to health, where it comes from, and the certification claim that addresses it.About Haloacetic acids (HAA5)
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water