Is Horseshoe Bay, TX tap water safe?
The short answer
5 of the 7 utilities serving Horseshoe Bay have a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and Texas’s records: City of Horseshoe Bay, Pecan Utilities Oak Ridge Subdivision, Llano County MUD 1 and 2 more.
City of Horseshoe Bay, which serves the most people here, has 1 result above the legal limit and 2 results above the health goal. The worst: Total trihalomethanes (TTHM) at 63 ppb, above the legal limit.
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 Horseshoe Bay’s ZIP codes, from EPA’s estimates.
- Open report
City of Horseshoe Bay
Texas · serves 12,729 people · about 1,600 in Horseshoe Bay
1 result above the legal limit and 2 results above the health goal. The worst: Total trihalomethanes (TTHM) at 63 ppb, above the legal limit.
9 health-based violations since 2016
- Open report
City of Cottonwood Shores
Texas · serves 2,157 people · about 530 in Horseshoe Bay
2 results above the health goal. The worst: Lead at 1.9 ppb, above the health goal.
No health-based violations since 2016
- Open report
Pecan Utilities Oak Ridge Subdivision
Texas · serves 588 people · under 100 in Horseshoe Bay
1 result above the legal limit. The worst: Total trihalomethanes (TTHM) at 72 ppb, above the legal limit.
1 health-based violation since 2016
- Open report
Llano County MUD 1
Texas · serves 747 people · under 100 in Horseshoe Bay
1 result above the legal limit and 1 result above the health goal. The worst: Total trihalomethanes (TTHM) at 92.5 ppb, above the legal limit.
15 health-based violations since 2016
- Open report
Deerhaven WCID
Texas · serves 336 people · under 100 in Horseshoe Bay
1 result above the health goal. The worst: Lead at 0.48 ppb, above the health goal.
10 health-based violations since 2016
- Open report
Sandy Harbor Subdivision
Texas · serves 333 people · under 100 in Horseshoe Bay
Nothing in its records is above a health goal.
3 health-based violations since 2016
- Open report
Channel Oaks Water System
Texas · serves 135 people · under 100 in Horseshoe Bay
3 results above the health goal. The worst: Arsenic at 4.9 ppb, above the health goal.
No health-based violations since 2016
MUD stands for municipal utility district, a local water and sewer district common in Texas.
What handles it
Each of these is certified, on a certifier’s listing, for a result above a line in City of Horseshoe Bay’s water, which serves the most people here. Another utility’s report names what handles its own results.
Disclosure: TapBuff earns a commission if you buy through some links on this page. It does not change which standard or filter we name. As an Amazon Associate, TapBuff earns from qualifying purchases. How TapBuff makes money
Aquasana Clean Water Machine (AQ-CWM2)
Countertop
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 9, 2026
Certified for: Total trihalomethanes (TTHM), Lead
Brita Hub Countertop Water Filter System (87340)
Countertop
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 9, 2026
- IAPMO listing:NSF/ANSI 53checked Oct. 9, 2026
Certified for: Total trihalomethanes (TTHM), Lead
Ninja HydraSense Countertop Water Filtration System (WF1001)
Countertop
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 9, 2026
Certified for: Total trihalomethanes (TTHM), Lead
Water testing near Horseshoe Bay
The 3 labs Texas certifies closest to Horseshoe Bay, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Environmental Monitoring Lab
Llano, TX · about 21 miles
Certified for bacteria
Integrity Testing, Inc.
Austin, TX · about 38 miles
Certified for lead and copper
Texas Department of State Health Services Laboratory Services Section
Austin, TX · about 41 miles
Certified for bacteria, lead and copper
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 Horseshoe Bay
Which ZIP codes are in Horseshoe Bay: 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 Horseshoe Bay
Towns nearby with a page of their own.
What to do next
- Read City of Horseshoe Bay’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- About Total trihalomethanes (TTHM)What it does to health, where it comes from, and the certification claim that addresses it.About Total trihalomethanes (TTHM)
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water