Is Mentone, CA tap water safe?
The short answer
1 of the 4 utilities serving Mentone has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and California’s records: Brookside MHP.
Redlands City MUD - Water Div, which serves the most people here, has 2 results 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 5.8 ppt, above EPA’s new limit, which takes effect in 2029.
The water from Redlands City MUD - Water Div is moderately hard to very hard depending on the source, 85 to 225 mg/L (5 to 13.2 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 Mentone’s ZIP codes, from EPA’s estimates.
- Open report
Redlands City MUD - Water Div
California · serves 78,025 people · about 5,500 in Mentone
2 results 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 5.8 ppt, above EPA’s new limit, which takes effect in 2029. Hardness: moderately hard to very hard depending on the source, 85 to 225 mg/L (5 to 13.2 grains per gallon).
No health-based violations since 2016
- Open report
Mill Creek Msc
California · serves 315 people · under 100 in Mentone
1 result above the health goal. The worst: Uranium at 11.9 ppb, above the health goal.
No health-based violations since 2016
- Open report
Rocky Comfort Mutual Water Co
California · serves 130 people · under 100 in Mentone
Nothing in its records is above a health goal.
No health-based violations since 2016
- Open report
Brookside MHP
California · serves 65 people · under 100 in Mentone
2 results above the health goal. The worst: Lead at 2.4 ppb, above the health goal. Hardness: hard, 175 mg/L (10.2 grains per gallon).
1 health-based violation since 2016
MUD stands for municipal utility district, a local water and sewer district common in Texas.
What handles it
Each of these is certified, on a certifier’s listing, for a result above a line in Redlands City MUD - Water Div’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: PFOS, PFOA, Lead, 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: PFOS, PFOA, Lead, 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: PFOS, PFOA, Lead, Arsenic
Water testing near Mentone
The 3 labs California certifies closest to Mentone, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
BSK Associates - San Bernardino Analytical Laboratory
San Bernardino, CA · about 9 miles
Certified for bacteria
Clinical Laboratory of San Bernardino, Inc.
Grand Terrace, CA · about 12 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, radioactivity
Babcock Laboratories, Inc.
Riverside, CA · about 14 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, PFAS, radioactivity
Which ZIP codes are in Mentone: 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 Mentone
Other towns in San Bernardino County with a page of their own.
What to do next
- Read Redlands City MUD - Water Div’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- Filters for PFOSRanked 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