Is El Paso de Robles (Paso Robles), CA tap water safe?
The short answer
1 of the 2 utilities serving El Paso de Robles (Paso Robles) has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and California’s records: Heritage Ranch CSD.
City of Paso Robles Water Division, which serves the most people here, has 1 result above EPA’s new limit, which takes effect in 2029, 2 results above the health goal and 1 result above EPA’s health benchmark. The worst: PFOA at 6.3 ppt, above EPA’s new limit, which takes effect in 2029.
The water from City of Paso Robles Water Division is hard to very hard depending on the source, 130 to 410 mg/L (7.6 to 24 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 El Paso de Robles (Paso Robles)’s ZIP codes, from EPA’s estimates.
- Open report
City of Paso Robles Water Division
California · serves 31,176 people · about 1,500 in El Paso de Robles (Paso Robles)
1 result above EPA’s new limit, which takes effect in 2029, 2 results above the health goal and 1 result above EPA’s health benchmark. The worst: PFOA at 6.3 ppt, above EPA’s new limit, which takes effect in 2029. Hardness: hard to very hard depending on the source, 130 to 410 mg/L (7.6 to 24 grains per gallon).
No health-based violations since 2016
- Open report
Heritage Ranch CSD
California · serves 2,956 people · about 140 in El Paso de Robles (Paso Robles)
2 results above the legal limit and 1 result above the health goal. The worst: Haloacetic acids (HAA5) at 76.3 ppb, above the legal limit. Hardness: moderately hard to hard depending on the source, 113 to 147 mg/L (6.6 to 8.6 grains per gallon).
15 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 Paso Robles Water Division’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: PFOA, 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: PFOA, 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: PFOA, Arsenic
Water testing near El Paso de Robles (Paso Robles)
The 3 labs California certifies closest to El Paso de Robles (Paso Robles), in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
County of San Luis Obispo Public Health Laboratory
San Luis Obispo, CA · about 27 miles
Certified for bacteria
Fruit Growers Laboratory, Inc.
San Luis Obispo, CA · about 29 miles
Certified for bacteria
Abalone Coast Analytical, Inc.
San Luis Obispo, CA · about 29 miles
Certified for bacteria
ZIP codes in El Paso de Robles (Paso Robles)
Which ZIP codes are in El Paso de Robles (Paso Robles): 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 El Paso de Robles (Paso Robles)
Other towns in San Luis Obispo County with a page of their own.
What to do next
- Read City of Paso Robles Water Division’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- Filters for PFOARanked by certification and what they cost over five years.The best water filters for PFAS, ranked
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water