Is Weed, CA tap water safe?
The short answer
1 of the 2 utilities serving Weed has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and California’s records: Lake Shastina C.S.D.
City of Weed, which serves the most people here, has 1 result above the health goal. The worst: Arsenic at 3.2 ppb, above the health goal. Health goals are stricter than legal limits and are not enforced.
The water from City of Weed is soft, typically 32 mg/L (1.9 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 Weed’s ZIP codes, from EPA’s estimates.
- Open report
City of Weed
California · serves 2,662 people · under 100 in Weed
1 result above the health goal. The worst: Arsenic at 3.2 ppb, above the health goal. Hardness: soft, typically 32 mg/L (1.9 grains per gallon).
No health-based violations since 2016
- Open report
Lake Shastina C.S.D
California · serves 2,790 people · under 100 in Weed
2 results above the health goal. The worst: Lead at 1.7 ppb, above the health goal. Hardness: moderately hard to hard depending on the source, 120 to 144 mg/L (7 to 8.4 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 Weed’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 Weed
The 2 labs California certifies closest to Weed, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Pace Analytical Services, LLC - Redding
Redding, CA · about 61 miles
Certified for bacteria
Spring Street Analytical
Klamath Falls, OR · about 64 miles
Certified for bacteria, nitrate
ZIP codes in Weed
Which ZIP codes are in Weed: 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 Weed
Other towns in Siskiyou County with a page of their own.
What to do next
- Read City of Weed’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