Is Atascocita, TX tap water safe?
The short answer
3 of the 15 utilities serving Atascocita have a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and Texas’s records: Trail of the Lakes MUD, Harris County MUD 46 and City of Houston.
Harris County MUD 109, which serves the most people here, has 2 results above the health goal. The worst: Arsenic at 3.0 ppb, above the health goal. 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 Atascocita’s ZIP codes, from EPA’s estimates.
- Open report
Harris County MUD 109
Texas · serves 9,501 people · about 7,200 in Atascocita
2 results above the health goal. The worst: Arsenic at 3.0 ppb, above the health goal.
No health-based violations since 2016
- Open report
Harris County MUD 290
Texas · serves 8,259 people · about 7,100 in Atascocita
1 result above EPA’s health benchmark. The worst: Lithium at 16 ppb, above EPA’s health benchmark.
No health-based violations since 2016
- Open report
Harris County MUD 153
Texas · serves 11,781 people · about 6,900 in Atascocita
2 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 15.6 ppb, above EPA’s health benchmark.
No health-based violations since 2016
- Open report
Harris County MUD 152
Texas · serves 7,314 people · about 6,400 in Atascocita
2 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 15.9 ppb, above EPA’s health benchmark.
No health-based violations since 2016
- Open report
Trail of the Lakes MUD
Texas · serves 9,480 people · about 6,200 in Atascocita
2 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 25.1 ppb, above EPA’s health benchmark.
6 health-based violations since 2016
- Open report
Harris County MUD 151
Texas · serves 7,464 people · about 5,800 in Atascocita
1 result above the health goal. The worst: Arsenic at 2.7 ppb, above the health goal.
No health-based violations since 2016
- Open report
Harris County MUD 132
Texas · serves 8,682 people · about 5,100 in Atascocita
2 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 15.1 ppb, above EPA’s health benchmark.
No health-based violations since 2016
- Open report
Harris County MUD 46
Texas · serves 5,418 people · about 4,200 in Atascocita
1 result above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 15.8 ppb, above EPA’s health benchmark.
1 health-based violation since 2016
- Open report
Harris County MUD 278
Texas · serves 10,584 people · about 4,100 in Atascocita
1 result above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 21 ppb, above EPA’s health benchmark.
No health-based violations since 2016
- Open report
Harris County MUD 106
Texas · serves 4,668 people · about 3,900 in Atascocita
2 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 16.8 ppb, above EPA’s health benchmark.
No health-based violations since 2016
5 more utilities in Atascocita
By EPA’s estimate, each serves fewer people in Atascocita than those above.
- City of Humbleserves 15,616 people · about 1,900 in Atascocita · no health-based violations since 2016
- Harris County MUD 504serves 7,242 people · about 1,700 in Atascocita · no health-based violations since 2016
- Harris County MUD 400 Eastserves 6,066 people · about 1,700 in Atascocita · no health-based violations since 2016
- City of Houstonserves 3 million people · about 1,600 in Atascocita · 1 health-based violation since 2016
- Harris County WCID 96serves 10,530 people · about 1,500 in Atascocita · 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 Harris County MUD 109’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, Lead
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, Lead
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, Lead
Water testing near Atascocita
The 3 labs Texas certifies closest to Atascocita, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
A & B Environmental Services, Inc.
Houston, TX · about 14 miles
Certified for bacteria, lead and copper
Water Utility Services, Inc.
Spring, TX · about 16 miles
Certified for bacteria
City of Houston Health Department, Bureau of Laboratory Services
Houston, TX · about 21 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 TexasWhich ZIP codes are in Atascocita: 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 Atascocita
Other towns in Harris County with a page of their own.
What to do next
- Read Harris County MUD 109’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- Filters for ArsenicRanked 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