Galveston County tap water: hardness, PFAS and lead
Galveston County, Texas has about 367,407 residents (Census 2024 estimate) and 26 community water systems in EPA records. The largest local system is City of League City, serving about 149,557 people from surface water.
! 1 of 6 largest systems with health-based violationsPFAS detected at 5 of 6 sampled systemsHardness 13.4 gpg (low confidence)
Public-record figures, not a test of your tap. Not 100% accurate or guaranteed. Confirm with a water test, your utility or a qualified pro before you buy or act.
How hard is Galveston County water?
City of League CityEstimate: untreated local water, not your tap · Low confidenceOlder data
13.4 gpg(230 mg/L), very hard
Galveston County: median of 92 results from 24 monitoring sites (streams and wells). Utilities may blend or treat water, so your tap can differ. This county's data is older or less complete; treat it with extra caution.
County estimates: Hard Water Map (hardwatermap.com), CC BY 4.0, derived from the USGS/EPA Water Quality Portal; file generated 2026-07-22. License
Public-record figures, not a test of your tap. Not 100% accurate or guaranteed. Confirm with a water test, your utility or a qualified pro before you buy or act.
Softener size at 13.4 gpg
For a 3-person home using 57 gallons per person per day and regenerating weekly, you'd remove about 16,040 grains between regenerations. Suggested size: 24,000 grain. This uses a low-confidence county estimate, so confirm with a test first.
Estimate only. Not 100% accurate or guaranteed. Confirm with a water test, your utility or a qualified pro before you buy or act.
The 6 biggest of 26 community water systems on EPA records for this county. Service areas don't follow county lines; your water bill names your provider.
City of League City
TX0840007 · serves about 149,557 people · Surface water
✓ No health-based violations✓ Lead below action levelPFAS detected (6 types)
Lead 90th percentile: 3 ppb (period starting 2022-01-01) Older result. Action level: 15 ppb (drops to 10 ppb on Nov 1, 2027).
PFPeA: highest sample 102 ppt (10 of 12 samples); no federal limit
PFBA: highest sample 31.9 ppt (9 of 12 samples); no federal limit
PFHxA: highest sample 7.1 ppt (10 of 12 samples); no federal limit
PFOS: highest sample 4.8 ppt (2 of 12 samples); federal limit 4.0 ppt as a running annual average
PFHxS: highest sample 4.5 ppt (2 of 12 samples); federal limit 10.0 ppt as a running annual average, also counted in EPA's PFAS mixture (hazard index) limit (currently in effect; EPA has proposed removing it)
PFBS: highest sample 4.1 ppt (4 of 12 samples); no individual limit; counted in EPA's PFAS mixture (hazard index) limit
Public-record figures, not a test of your tap. Not 100% accurate or guaranteed. Confirm with a water test, your utility or a qualified pro before you buy or act.
A PFAS detection is not a violation. Federal limits (4 ppt for PFOA and PFOS) apply to running annual averages, with compliance required by 2029. In May 2026 EPA proposed extending the PFOA/PFOS deadline to 2031 and removing other PFAS limits; not final as of 2026-10-21.
Test your own tap
These are public records for whole systems. Your home's pipes, fixtures and any private well can change what you drink. A certified lab test or a hardness test strip gives you your own numbers. Then use our PFAS and lead filter selector to see which certifications to look for.
Common questions about Galveston County water
Is tap water in Galveston County safe to drink?
1 of the 6 largest systems here have at least one health-based violation in EPA records since October 2021 (see each system below for status). City of League City's most recent lead 90th percentile was 3 ppb (2022), below the 15 ppb action level. Public records can't guarantee what comes out of your tap, especially with older plumbing, so a home test is the surest check.
How hard is the water in Galveston County?
There's no published utility figure in our data, but untreated local stream and well samples in Galveston County have a median of about 13.4 grains per gallon (230 mg/L, very hard). That's a low-confidence estimate of source water, not your tap, so test before you buy equipment. For a 3-person home at 13.4 gpg, our softener calculator suggests a 24,000 grain unit as a starting point.
Is there PFAS in Galveston County water?
5 of the 6 sampled systems listed here detected at least one PFAS in EPA's UCMR 5 testing, and one result was above the level of a federal limit in at least one sample. A detection isn't a violation: federal PFAS limits apply to running annual averages starting in 2029.
Which water system serves my address in Galveston County?
Most homes are served by City of League City or one of the other systems listed on this page, but service areas don't follow county lines. Your water bill names your provider, and its annual Consumer Confidence Report has the full test results.
Data as of October 21, 2026. Figures are copied from public records and combined with our own calculations; they can be out of date or wrong. Tapped Out isn't affiliated with any utility or the EPA. Written and reviewed by the Tapped Out team. How we calculate · All sources.