City water profile

Water hardness in Willis

Find official utility reports, understand hardness, and check the water system serving your home in Willis, Texas.

Utility-reported hardness

Not yet available

Check your provider and source →

State comparison: Unavailable
Evidence comparison rank: —
Matched utilities: 1
Active health records: 0

Your tap water

What does the utility report?

Match the utility name to your water bill. These results describe the utility’s water, not a test at your home. A ZIP can include several water systems.

Utility hardness unavailable in this index

Nearby river or groundwater samples cannot tell us the hardness coming out of your tap. Ask your water provider for total hardness as CaCO₃, or test it at home.

Find an official utility report →

Convert a hardness result →Test your tap →

Match the name on your water bill

Your utility’s measurements and compliance records

These are possible serving systems. A record for one system does not apply to every home in this ZIP. Confirm your provider before interpreting a measurement or notice. Federal records can lag current utility notices.

EPA snapshot: 2026Q2. Historical window begins Jan 1, 2021.

City Of Willis

TX1700003 · Groundwater · 14,133 people served system-wide

A municipal system, in-state city, and served county all agree with this Census ZCTA.

No active health-based record in this imported snapshot

Find this utility’s official report →

Measurements (1)

An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.

Lead (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Below action level

Reported level: 7.0e-4 mg/L
Action level: 0.015 mg/L

5% of the listed benchmark

Monitoring period: Jan 1, 2025 to Dec 31, 2025

Violation history (31)

Imported violation history for City Of Willis
Rule	Status	Period
Revised Total Coliform RuleHealth-based	Resolved	Feb 10, 2026 to Apr 2, 2026
Public Notice	Resolved	Nov 6, 2025 to Feb 2, 2026
Public Notice	Unaddressed	Sep 13, 2025
Revised Total Coliform RuleHealth-based	Resolved	Sep 1, 2025 to Sep 30, 2025
LEAD AND COPPER RULE REVISIONS	Resolved	Jul 2, 2025 to Apr 27, 2026
Consumer Confidence Rule	Unaddressed	Jul 1, 2025
Lead and Copper Rule	Resolved	Oct 1, 2024 to Oct 3, 2025
E. COLI	Resolved	Jun 28, 2024 to Jun 21, 2024
Picloram	Archived	Jan 1, 2021 to Dec 31, 2023
Carbofuran	Archived	Jan 1, 2021 to Dec 31, 2023
Dinoseb	Archived	Jan 1, 2021 to Dec 31, 2023
2,4,5-TP	Archived	Jan 1, 2021 to Dec 31, 2023
Antimony, Total	Archived	Jan 1, 2021 to Dec 31, 2023
CYANIDE	Archived	Jan 1, 2021 to Dec 31, 2023
Thallium, Total	Archived	Jan 1, 2021 to Dec 31, 2023
Aldicarb sulfone	Archived	Jan 1, 2021 to Dec 31, 2023
Aldicarb	Archived	Jan 1, 2021 to Dec 31, 2023
Mercury	Archived	Jan 1, 2021 to Dec 31, 2023
Selenium	Archived	Jan 1, 2021 to Dec 31, 2023
Chromium	Archived	Jan 1, 2021 to Dec 31, 2023
Fluoride	Archived	Jan 1, 2021 to Dec 31, 2023
Beryllium, Total	Archived	Jan 1, 2021 to Dec 31, 2023
Barium	Archived	Jan 1, 2021 to Dec 31, 2023
Aldicarb sulfoxide	Archived	Jan 1, 2021 to Dec 31, 2023
ETHYLENE DIBROMIDE	Archived	Jan 1, 2021 to Dec 31, 2023
1,2-DIBROMO-3-CHLOROPROPANE	Archived	Jan 1, 2021 to Dec 31, 2023
Dalapon	Archived	Jan 1, 2021 to Dec 31, 2023
OXAMYL	Archived	Jan 1, 2021 to Dec 31, 2023
Cadmium	Archived	Jan 1, 2021 to Dec 31, 2023
2,4-D	Archived	Jan 1, 2021 to Dec 31, 2023
Arsenic	Archived	Jan 1, 2021 to Dec 31, 2023

City summary

What the indexed records say

Willis has 1 published ZIP profile across Montgomery County. The regional-evidence median is 154 PPM. The city does not meet the stricter comparison standard.

Because only one ZIP is represented, the city median and range are the same local estimate. It should not be read as multiple independent samples across the community.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs

Moderately hard0 ZIPs

Hard1 ZIP

Very hard0 ZIPs

1 of 1 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance: 5.9 miles
Profiles with evidence: 1/1

Confidence labels

High: 1Moderate: 0Low: 0

Observation window: Jul 18, 2017 to Jun 12, 2025.

ZIP directory

Water reports in Willis

Open a ZIP for site-level provenance and measurements.

ZIP code

77378

Hard

154 PPM

Nearest site: 5.9 mi
Confidence: High

View full ZIP evidence →

Practical next steps

Move from index to evidence

1. Open your ZIP. Check distance, dates, confidence, and the associated utility.
2. Read the current CCR. Confirm source water, detections, limits, ranges, and notices.
3. Use a measured hardness result. Confirm health concerns or treatment sizing with the right method.

Continue comparing

Other Texas communities

Conroe

Montgomery County

65 PPM median

Montgomery

Montgomery County

150 PPM median

Splendora

Montgomery County

156 PPM median

Cleveland

Liberty County

154 PPM median

Cedar Park

Williamson County

153 PPM median

Pflugerville

Travis County

153 PPM median

Search all 529 Texas cities →

Questions people ask

About water in Willis

Is the water hard?

Check the utility-reported result above when available. Nearby environmental samples cannot establish tap-water hardness. Ask your provider or test your tap.

Is the tap water safe?

Compliance history is utility-wide and cannot guarantee conditions at every tap. Check current notices and test when address-specific evidence is needed.

Do I need treatment?

Choose treatment only after confirming the problem at the property. A softener targets hardness; contaminant treatment requires a matching, verified performance claim.