Is Broadmoor, CA tap water safe?
The short answer
Neither of the 2 utilities serving Broadmoor has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and California’s records.
City of Daly City, which serves the most people here, has 3 results above the health goal. The worst: Nitrate at 17 ppm, above the health goal. Health goals are stricter than legal limits and are not enforced.
The water from City of Daly City is hard to very hard depending on the source, 142 to 310 mg/L (8.3 to 18.1 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 Broadmoor’s ZIP codes, from EPA’s estimates.
- Open report
City of Daly City
California · serves 102,593 people · about 4,400 in Broadmoor
3 results above the health goal. The worst: Nitrate at 17 ppm, above the health goal. Hardness: hard to very hard depending on the source, 142 to 310 mg/L (8.3 to 18.1 grains per gallon).
No health-based violations since 2016
- Open report
California Water Service - S San Francisco
California · serves 62,609 people · about 490 in Broadmoor
3 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 23.6 ppb, above EPA’s health benchmark. Hardness: very hard, typically 382 mg/L (22.3 grains per gallon).
No 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 Daly City’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 Broadmoor
The 3 labs California certifies closest to Broadmoor, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Cel Analytical, Inc.
San Francisco, CA · about 8 miles
Certified for bacteria, minerals and other inorganics
Garratt-Callahan Laboratory
Burlingame, CA · about 8 miles
Certified for nitrate, metals, minerals and other inorganics
Eurofins Built Environment Testing West-Burlingame
Burlingame, CA · about 10 miles
Certified for bacteria
ZIP codes in Broadmoor
Which ZIP codes are in Broadmoor: 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 Broadmoor
Other towns in San Mateo County with a page of their own.
What to do next
- Read City of Daly City’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