Is Westlake, LA tap water safe?
The short answer
2 of the 2 utilities serving Westlake have a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and CDC’s records: City of Westlake Water System and Calcasieu Parish Ww District No 4.
City of Westlake Water System, which serves the most people here, has 1 result above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 18.9 ppb, above EPA’s health benchmark. Health goals are stricter than legal limits and are not enforced.
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 Westlake’s ZIP codes, from EPA’s estimates.
- Open report
City of Westlake Water System
Louisiana · serves 4,858 people · about 680 in Westlake
1 result above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 18.9 ppb, above EPA’s health benchmark.
4 health-based violations since 2016
- Open report
Calcasieu Parish Ww District No 4
Louisiana · serves 5,340 people · about 430 in Westlake
1 result above the health goal. The worst: Lead at 2.0 ppb, above the health goal.
7 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 Westlake Water System’s water, which serves the most people here. Another utility’s report names what handles its own results.
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Brita Tahoe Pitcher with Elite Filter (OB60, OB06)
Pitcher
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 13, 2026
- IAPMO listing:NSF/ANSI 53checked Oct. 13, 2026
Certified for: Lead
Brita Everyday Pitcher with Elite Filter (OB46, OB06)
Pitcher
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 13, 2026
Certified for: Lead
PUR PLUS 11-Cup Pitcher (PPT111W)
Pitcher
- NSF listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 4, 2026
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 4, 2026
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 4, 2026
Certified for: Lead
Water testing near Westlake
The 3 labs Louisiana certifies closest to Westlake, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
LDH Lake Charles Regional Laboratory
Lake Charles, LA · about 4 miles
Certified for bacteria
JRTC & Fort Johnson Environmental Laboratory
Fort Polk, LA · about 56 miles
Certified for bacteria
SGS North America, Inc. - Scott
Scott, LA · about 69 miles
Certified for nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts
ZIP codes in Westlake
Which ZIP codes are in Westlake: 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: LDH, laboratories certified by Louisiana for drinking water analysis; distances from the Census 2020 ZIP code tabulation area gazetteer.
Near Westlake
Other towns in Calcasieu Parish with a page of their own.
What to do next
- Read City of Westlake Water System’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