Is Humble, TX tap water safe?
The short answer
2 of the 15 utilities serving Humble 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 Houston and Trail of the Lakes MUD.
Harris County MUD 26, which serves the most people here, has 3 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 19.8 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 Humble’s ZIP codes, from EPA’s estimates.
- Open report
Harris County MUD 26
Texas · serves 17,178 people · about 4,100 in Humble
3 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 19.8 ppb, above EPA’s health benchmark.
No health-based violations since 2016
- Open report
City of Humble
Texas · serves 15,616 people · about 3,600 in Humble
3 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 22.1 ppb, above EPA’s health benchmark.
No health-based violations since 2016
- Open report
Hunters Glen MUD
Texas · serves 9,405 people · about 2,600 in Humble
2 results above the health goal. The worst: Arsenic at 2.2 ppb, above the health goal.
No health-based violations since 2016
- Open report
City of Houston
Texas · serves 3 million people · about 1,400 in Humble
3 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 33.9 ppb, above EPA’s health benchmark.
1 health-based violation since 2016
- Open report
Harris County WCID 96
Texas · serves 10,530 people · about 940 in Humble
1 result above the health goal. The worst: Lead at 0.5 ppb, above the health goal.
No health-based violations since 2016
- Open report
Harris County MUD 49
Texas · serves 10,893 people · about 890 in Humble
1 result above the health goal. The worst: Lead at 1.6 ppb, above the health goal.
No health-based violations since 2016
- Open report
Harris County MUD 278
Texas · serves 10,584 people · about 800 in Humble
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 400 - West
Texas · serves 5,217 people · about 660 in Humble
2 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 19.9 ppb, above EPA’s health benchmark.
No health-based violations since 2016
- Open report
El Dorado Utility District
Texas · serves 3,591 people · about 500 in Humble
2 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 19.9 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 450 in Humble
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
5 more utilities in Humble
By EPA’s estimate, each serves fewer people in Humble than those above.
- Woodcreek MUDserves 4,464 people · about 230 in Humble · no health-based violations since 2016
- North Belt Forestserves 897 people · about 210 in Humble · no health-based violations since 2016
- Harris County MUD 400 Eastserves 6,066 people · about 170 in Humble · no health-based violations since 2016
- Classic Pines Subdivisionserves 960 people · about 160 in Humble · no health-based violations since 2016
- Parkland Estatesserves 228 people · about 150 in Humble · 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 26’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
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 Humble
The 3 labs Texas certifies closest to Humble, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Water Utility Services, Inc.
Spring, TX · about 13 miles
Certified for bacteria
A & B Environmental Services, Inc.
Houston, TX · about 15 miles
Certified for bacteria, lead and copper
Eurofins EMLab P&K – Houston
Houston, TX · about 20 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 Humble: 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 Humble
Other towns in Harris County with a page of their own.
What to do next
- Read Harris County MUD 26’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