Is Roseville, CA tap water safe?
The short answer
1 of the 5 utilities serving Roseville has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and California’s records: Rosecrest Mutual.
City of Roseville, which serves the most people here, has 1 result above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 62.6 ppb, above EPA’s health benchmark. Health goals are stricter than legal limits and are not enforced.
The water from City of Roseville is soft to very hard depending on the source, 18 to 250 mg/L (1 to 14.6 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 Roseville’s ZIP codes, from EPA’s estimates.
- Open report
City of Roseville
California · serves 165,736 people · about 90,300 in Roseville
1 result above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 62.6 ppb, above EPA’s health benchmark. Hardness: soft to very hard depending on the source, 18 to 250 mg/L (1 to 14.6 grains per gallon).
No health-based violations since 2016
- Open report
Placer CWA - Foothill
California · serves 93,417 people · about 3,300 in Roseville
1 result above the health goal. The worst: Arsenic at 1.3 ppb, above the health goal. Hardness: soft to moderately hard depending on the source, 13 to 93 mg/L (0.8 to 5.4 grains per gallon).
No health-based violations since 2016
- Open report
Cal Am - West Placer
California · serves 9,547 people · about 2,900 in Roseville
Nothing in its records is above a health goal. Hardness: soft, typically 26 mg/L (1.5 grains per gallon).
No health-based violations since 2016
- Open report
Citrus Heights Water District
California · serves 67,818 people · about 970 in Roseville
2 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 18 ppb, above EPA’s health benchmark. Hardness: moderately hard to hard depending on the source, 99 to 165 mg/L (5.8 to 9.6 grains per gallon).
No health-based violations since 2016
- Open report
Rosecrest Mutual
California · serves 31 people · under 100 in Roseville
2 results above the health goal. The worst: Arsenic at 3.1 ppb, above the health goal. Hardness: moderately hard, 103 mg/L (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 Roseville’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
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
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 Roseville
The 3 labs California certifies closest to Roseville, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
BSK Associates - Sacramento Analytical Laboratory
Sacramento, CA · about 12 miles
Certified for bacteria, nitrate, minerals and other inorganics
California Laboratory Services
Rancho Cordova, CA · about 13 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts
Bend Genetics LLC
Sacramento, CA · about 14 miles
Which ZIP codes are in Roseville: 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 Roseville
Other towns in Placer County with a page of their own.
What to do next
- Read City of Roseville’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- About LithiumWhat it does to health, where it comes from, and the certification claim that addresses it.About Lithium
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water