Is Onalaska, TX tap water safe?
The short answer
3 of the 5 utilities serving Onalaska have a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and Texas’s records: Canyon Park WSC, Lake Livingston Oakridge North and Lake Livingston Sportsmans Retreat.
Onalaska WSC, 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 230 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 Onalaska’s ZIP codes, from EPA’s estimates.
- Open report
Onalaska WSC
Texas · serves 5,289 people · about 470 in Onalaska
1 result above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 230 ppb, above EPA’s health benchmark.
No health-based violations since 2016
- Open report
Canyon Park WSC
Texas · serves 1,200 people · about 160 in Onalaska
1 result above EPA’s health benchmark. The worst: Lithium at 94.8 ppb, above EPA’s health benchmark.
1 health-based violation since 2016
- Open report
Yaupon Cove
Texas · serves 1,000 people · about 120 in Onalaska
1 result above EPA’s health benchmark. The worst: Lithium at 70 ppb, above EPA’s health benchmark.
No health-based violations since 2016
- Open report
Lake Livingston Oakridge North
Texas · serves 3,284 people · under 100 in Onalaska
1 result above the health goal. The worst: Lead at 0.59 ppb, above the health goal.
9 health-based violations since 2016
- Open report
Lake Livingston Sportsmans Retreat
Texas · serves 440 people · under 100 in Onalaska
1 result above the health goal. The worst: Lead at 0.93 ppb, above the health goal.
2 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 Onalaska WSC’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 Onalaska
The 3 labs Texas certifies closest to Onalaska, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Eastex Environmental Lab, Inc. -Coldspring
Coldspring, TX · about 15 miles
Certified for bacteria, lead and copper
Chaparral Laboratories, Inc.
Huntsville, TX · about 26 miles
Certified for bacteria, lead and copper
Nova Biologicals, Inc.
Conroe, TX · about 42 miles
Certified for bacteria
Texas Well Owner Network, Texas A&M AgriLife Extension: Well Informed screening events, where well owners bring in water samples to be screened for common contaminants, followed by an hour-long session explaining the results. Upcoming events are on the network's calendar. Trainings, Texas Well Owner Network.
All 80 certified labs for TexasZIP codes in Onalaska
Which ZIP codes are in Onalaska: 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: TCEQ, drinking water laboratories approved for public water system samples; distances from the Census 2020 ZIP code tabulation area gazetteer.
Near Onalaska
Towns nearby with a page of their own.
What to do next
- Read Onalaska WSC’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