Is Delano, CA tap water safe?
The short answer
None of the 3 utilities serving Delano has 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 Delano, which serves the most people here, has 1 result above the limit’s level with no violation recorded, 1 result above the health goal and 1 result above EPA’s health benchmark. The worst: Arsenic at 10.7 ppb, above the limit’s level, no violation. Health goals are stricter than legal limits and are not enforced.
The water from City of Delano is soft to hard depending on the source, 11 to 130 mg/L (0.6 to 7.6 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 Delano’s ZIP codes, from EPA’s estimates.
- Open report
City of Delano
California · serves 51,428 people · about 4,400 in Delano
1 result above the limit’s level with no violation recorded, 1 result above the health goal and 1 result above EPA’s health benchmark. The worst: Arsenic at 10.7 ppb, above the limit’s level, no violation. Hardness: soft to hard depending on the source, 11 to 130 mg/L (0.6 to 7.6 grains per gallon).
No health-based violations since 2016
- Open report
Kern Valley State Prison
California · serves 5,000 people · about 250 in Delano
1 result above the health goal. The worst: Arsenic at 8.3 ppb, above the health goal. Hardness: soft, typically 13 mg/L (0.7 grains per gallon).
No health-based violations since 2016
- Open report
Agbayani Village Water System
California · serves 26 people · under 100 in Delano
2 results above the health goal. The worst: Arsenic at 7.4 ppb, above the health goal. Hardness: very hard, 260 mg/L (15.2 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 Delano’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, Nitrate
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, Nitrate
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 Delano
The 3 labs California certifies closest to Delano, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
BSK Associates - Bakersfield Analytical Laboratory
Bakersfield, CA · about 26 miles
Certified for bacteria
Pace Analytical Services, LLC dba BC Laboratories, Inc.
Bakersfield, CA · about 27 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, radioactivity
Zalco Laboratories, Inc.
Bakersfield, CA · about 27 miles
Certified for bacteria, nitrate, metals, minerals and other inorganics, organic chemicals, disinfection byproducts
ZIP codes in Delano
Which ZIP codes are in Delano: 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 Delano
Other towns in Tulare County with a page of their own.
What to do next
- Read City of Delano’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