Is Paramount, CA tap water safe?
The short answer
Neither of the 2 utilities serving Paramount has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and California’s records.
Paramount - City, Water Dept., which serves the most people here, has 2 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 56 ppb, above EPA’s health benchmark. Health goals are stricter than legal limits and are not enforced.
The water from Paramount - City, Water Dept. is hard to very hard depending on the source, 170 to 230 mg/L (9.9 to 13.5 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 Paramount’s ZIP codes, from EPA’s estimates.
- Open report
Paramount - City, Water Dept.
California · serves 55,200 people · about 47,400 in Paramount
2 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 56 ppb, above EPA’s health benchmark. Hardness: hard to very hard depending on the source, 170 to 230 mg/L (9.9 to 13.5 grains per gallon).
No health-based violations since 2016
- Open report
Gswc - Hollydale
California · serves 8,099 people · about 2,400 in Paramount
2 results above the health goal. The worst: Arsenic at 5.4 ppb, above the health goal. Hardness: very hard, typically 268 mg/L (15.6 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 Paramount - City, Water Dept.’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 Paramount
The 3 labs California certifies closest to Paramount, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Los Angeles County Public Health Laboratory
Downey, CA · about 2 miles
Certified for bacteria
SGS Forensic Laboratories
Carson, CA · about 4 miles
Certified for metals
JK BioScience Inc.
Rancho Dominguez, CA · about 5 miles
Certified for bacteria, lead and copper, metals
ZIP codes in Paramount
Which ZIP codes are in Paramount: 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 Paramount
Other towns in Los Angeles County with a page of their own.
What to do next
- Read Paramount - City, Water Dept.’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