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League City Water Quality Report

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Showing utility report

City of League City

2026 report with 2025 data; individual rows keep their dates

Municipal utility results; supplier EP002 hardness is separately labelled. Galveston County is not one water system.

Your water at a glance

See the amount, the comparison and what it means. “Below” refers to the stated benchmark, not zero risk.

Hardness

Hard — entry-point result

124mg/L as CaCO₃

SEWPP supplier/entry point EP002 only in 2026 report; min/avg/max124

Do not label citywide tap hardness. Report has multiple supplies/groundwater wells. Verify home's current blend.

2025View source

Chloramine

Average below MRDL

2.39mg/L

Average; range 0.50–3.63

MRDL 4 mg/L

2025View source

TTHMs

Reported maximum below MCL; compliance uses required averaging

46.9µg/L

Highest level reported; range 22.9–46.9; source does not identify this column as LRAA

MCL 80 µg/L

2025View source

HAA5

Reported maximum below MCL

34µg/L

Highest level reported; range 14.1–34

MCL 60 µg/L

2025View source

Fluoride

Below MCL

0.20mg/L

Highest municipal value; distinct from supplier0.21

MCL 4 mg/L

2025-03-17View source

Lead

90th percentile below action level; one individual site exceeded

3µg/L

90th percentile; range 0–58; one site above action level

Action level 15 µg/L

2022–2024View source

PFAS

Cannot assess high or low

Not verified

No compound-specific result assessed in this summary

This does not establish whether PFAS are present or absent. Check compound-specific testing before choosing treatment.

2025 report reviewView source

Nitrate

Below MCL

0.89mg/L

Highest municipal value; range 0.08–0.89

MCL 10 mg/L

2025-03-17View source
View Full Water ReportOpen the measured results, dates, comparisons and original utility report.

The numbers behind your report

Selected useful results—not a replacement for the utility’s complete report. Older measurements retain their original year.

Open the complete utility report ↗

What was measuredReported amountSample year / source dateHow to read it
Hardness124 mg/L as CaCO₃SEWPP supplier/entry point EP002 only in 2026 report; min/avg/max1242025View source ↗Hard — entry-point resultDo not label citywide tap hardness. Report has multiple supplies/groundwater wells. Verify home's current blend.
Chloramine2.39 mg/L Average; range 0.50–3.632025View source ↗Average below MRDL · MRDL 4 mg/L
TTHM46.9 µg/L Highest level reported; range 22.9–46.9; source does not identify this column as LRAA2025View source ↗Reported maximum below MCL; compliance uses required averaging · MCL 80 µg/L
HAA534 µg/L Highest level reported; range 14.1–342025View source ↗Reported maximum below MCL · MCL 60 µg/L
Fluoride0.20 mg/L Highest municipal value; distinct from supplier0.212025-03-17View source ↗Below MCL · MCL 4 mg/L
Nitrate0.89 mg/L Highest municipal value; range 0.08–0.892025-03-17View source ↗Below MCL · MCL 10 mg/L
Lead3 µg/L 90th percentile; range 0–58; one site above action level2022–2024View source ↗90th percentile below action level; one individual site exceeded · Action level 15 µg/LA system sampling percentile is not a measurement of your faucet.
Copper0.464 mg/L 90th percentile; range 0.0033–1.082022–2024View source ↗90th percentile below action level · Action level 1.3 mg/LA system sampling percentile is not a measurement of your faucet.
PFASNot verified No compound-specific result assessed in this summary2025 report reviewView source ↗Cannot assess high or lowThis does not establish whether PFAS are present or absent. Check compound-specific testing before choosing treatment.

ppm ≈ mg/L; ppb ≈ µg/L; ppt ≈ ng/L in drinking water. Hardness in gpg = mg/L as CaCO₃ ÷ 17.1. ND means not detected at the method’s reporting limit—not zero.

MCL is a maximum contaminant level. MRDL is a disinfectant limit. Lead/copper action levels use system sampling percentiles and are not a safe-tap threshold. TTHM/HAA5 compliance uses locational annual averages.

PFOA/PFOS comparisons use EPA’s 4 ppt values. Historical detections are not a present compliance finding; EPA assesses compliance using running annual averages. Rule implementation is being reviewed. EPA PFAS benchmarks and implementation ↗

Hardness source ↗USGS hardness classification ↗

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Source water. Purchased surface water from Gulf Coast Water Authority (Brazos River) and Houston (Trinity River), with groundwater wells also listed.

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More about your local water

What this means for your home

Understand the hardness result for your water supply.

The report distinguishes municipal contaminant results from supplying entry points. It also reports lead as a 90th-percentile statistic with one individual sample above the action level; a low system percentile does not establish the result at your faucet.

Filter vs. softener: what each doesPlan installation with your plumber

A useful local question

Is League City hardness unreported?

No. The report includes 124 mg/L as calcium carbonate for the SEWPP entry point EP002. It is hard on the USGS scale. Confirm your home's current supply and hardness before setting a softener.

Sources and methodology

We keep each utility’s results separate, show the reported sample year, and distinguish averages, maxima and tap-sampling percentiles. Hardness classifications use USGS ranges. Missing data stays unknown.

Sources checked October 23, 2026

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Choose the system size, keep useful existing equipment, and review your filtration goals.

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