Is Lake of the Woods, CA tap water safe?
The short answer
2 of the 2 utilities serving Lake of the Woods have a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and California’s records: Frazier Park PUD and Lake of the Woods Mobile Village.
Frazier Park PUD, which serves the most people here, has 1 result above the legal limit and 2 results above the health goal. The worst: Nitrate at 11 ppm, above the legal limit.
The water from Frazier Park PUD is very hard, typically 451 mg/L (26.4 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 Lake of the Woods’s ZIP codes, from EPA’s estimates.
- Open report
Frazier Park PUD
California · serves 2,592 people · under 100 in Lake of the Woods
1 result above the legal limit and 2 results above the health goal. The worst: Nitrate at 11 ppm, above the legal limit. Hardness: very hard, typically 451 mg/L (26.4 grains per gallon).
1 health-based violation since 2016
- Open report
Lake of the Woods Mobile Village
California · serves 82 people · under 100 in Lake of the Woods
2 results above the health goal. The worst: Uranium at 20 ppb, above the health goal. Hardness: very hard, 375 mg/L (21.9 grains per gallon).
9 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 Frazier Park PUD’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: Nitrate, 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: Nitrate, Arsenic
Culligan 10-Cup Pitcher with ZeroWater Technology (ZEROP10)
Pitcher
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 9, 2026
Certified for: Nitrate
Water testing near Lake of the Woods
The 3 labs California certifies closest to Lake of the Woods, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Fruit Growers Laboratory, Inc.
Santa Paula, CA · about 30 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, radioactivity
Capco Analytical Services
Ventura, CA · about 37 miles
Certified for bacteria, nitrate, metals, minerals and other inorganics
Ventura County Public Health Laboratory
Oxnard, CA · about 39 miles
Certified for bacteria
ZIP codes in Lake of the Woods
Which ZIP codes are in Lake of the Woods: 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 Lake of the Woods
Other towns in Ventura County with a page of their own.
What to do next
- Read Frazier Park PUD’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- Filters for NitrateRanked 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