City water profile

Water hardness in Madill

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

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.

Madill

OK1010820 · Surface water · 3,410 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 (3)

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: 0.0017 mg/L
Action level: 0.015 mg/L

11% of the listed benchmark

Monitoring period: Jan 1, 2021 to Dec 31, 2023

Total Haloacetic Acids (HAA5)

EPA SDWIS reported health-based violation

Reported violation

Reported level: 0.061 MG/L
Maximum contaminant level: 0.06 MG/L

102% of the listed benchmark

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

TTHM

EPA SDWIS reported health-based violation

Reported violation

Reported level: 0.096 MG/L
Maximum contaminant level: 0.08 MG/L

120% of the listed benchmark

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

Violation history (56)

Imported violation history for Madill
Rule	Status	Period
Chlorine	Archived	Jan 1, 2026 to Jan 31, 2026
Revised Total Coliform Rule	Archived	Jan 1, 2026 to Jan 31, 2026
Total Haloacetic Acids (HAA5)	Resolved	Dec 30, 2025 to Feb 4, 2026
TTHM	Resolved	Dec 30, 2025 to Feb 4, 2026
Total Haloacetic Acids (HAA5)Health-based	Archived	Oct 1, 2025 to Dec 31, 2025
Total Haloacetic Acids (HAA5)Health-based	Archived	Oct 1, 2025 to Dec 31, 2025
TTHMHealth-based	Archived	Oct 1, 2025 to Dec 31, 2025
Total Haloacetic Acids (HAA5)Health-based	Archived	Jul 1, 2025 to Sep 30, 2025
TTHMHealth-based	Archived	Jul 1, 2025 to Sep 30, 2025
TTHMHealth-based	Archived	Jul 1, 2025 to Sep 30, 2025
Total Haloacetic Acids (HAA5)Health-based	Archived	Jul 1, 2025 to Sep 30, 2025
Total Haloacetic Acids (HAA5)Health-based	Archived	Apr 1, 2025 to Jun 30, 2025
TTHMHealth-based	Archived	Apr 1, 2025 to Jun 30, 2025
TTHMHealth-based	Archived	Apr 1, 2025 to Jun 30, 2025
Total Haloacetic Acids (HAA5)Health-based	Archived	Apr 1, 2025 to Jun 30, 2025
Total Haloacetic Acids (HAA5)Health-based	Archived	Jan 1, 2025 to Mar 31, 2025
Total Haloacetic Acids (HAA5)Health-based	Archived	Jan 1, 2025 to Mar 31, 2025
TTHMHealth-based	Archived	Jan 1, 2025 to Mar 31, 2025
TTHMHealth-based	Archived	Jan 1, 2025 to Mar 31, 2025
TTHMHealth-based	Archived	Oct 1, 2024 to Dec 31, 2024
TTHMHealth-based	Archived	Oct 1, 2024 to Dec 31, 2024
Total Haloacetic Acids (HAA5)Health-based	Archived	Oct 1, 2024 to Dec 31, 2024
Total Haloacetic Acids (HAA5)Health-based	Archived	Oct 1, 2024 to Dec 31, 2024
Total Haloacetic Acids (HAA5)Health-based	Archived	Jul 1, 2024 to Sep 30, 2024
TTHMHealth-based	Archived	Jul 1, 2024 to Sep 30, 2024
TTHMHealth-based	Archived	Jul 1, 2024 to Sep 30, 2024
Total Haloacetic Acids (HAA5)Health-based	Archived	Jul 1, 2024 to Sep 30, 2024
TTHMHealth-based	Archived	Apr 1, 2024 to Jun 30, 2024
TTHMHealth-based	Archived	Apr 1, 2024 to Jun 30, 2024
TTHMHealth-based	Archived	Apr 1, 2023 to Jun 30, 2023
Chlorine	Resolved	Apr 1, 2023 to Jun 30, 2023
1,2,4-Trichlorobenzene	Archived	Jan 1, 2023 to Dec 31, 2025
Xylenes, Total	Archived	Jan 1, 2023 to Dec 31, 2025
DICHLOROMETHANE	Archived	Jan 1, 2023 to Dec 31, 2025
p-Dichlorobenzene	Archived	Jan 1, 2023 to Dec 31, 2025
Vinyl chloride	Archived	Jan 1, 2023 to Dec 31, 2025
trans-1,2-Dichloroethylene	Archived	Jan 1, 2023 to Dec 31, 2025
1,1,1-Trichloroethane	Archived	Jan 1, 2023 to Dec 31, 2025
Carbon tetrachloride	Archived	Jan 1, 2023 to Dec 31, 2025
Trichloroethylene	Archived	Jan 1, 2023 to Dec 31, 2025
1,1,2-Trichloroethane	Archived	Jan 1, 2023 to Dec 31, 2025
Tetrachloroethylene	Archived	Jan 1, 2023 to Dec 31, 2025
Benzene	Archived	Jan 1, 2023 to Dec 31, 2025
Ethylbenzene	Archived	Jan 1, 2023 to Dec 31, 2025
CHLOROBENZENE	Archived	Jan 1, 2023 to Dec 31, 2025
cis-1,2-Dichloroethylene	Archived	Jan 1, 2023 to Dec 31, 2025
1,2-Dichloropropane	Archived	Jan 1, 2023 to Dec 31, 2025
o-Dichlorobenzene	Archived	Jan 1, 2023 to Dec 31, 2025
Toluene	Archived	Jan 1, 2023 to Dec 31, 2025
1,2-Dichloroethane	Archived	Jan 1, 2023 to Dec 31, 2025
TTHMHealth-based	Archived	Jan 1, 2023 to Mar 31, 2023
Styrene	Archived	Jan 1, 2023 to Dec 31, 2025
1,1-Dichloroethylene	Archived	Jan 1, 2023 to Dec 31, 2025
TTHMHealth-based	Archived	Jan 1, 2023 to Mar 31, 2023
TTHMHealth-based	Archived	Oct 1, 2022 to Dec 31, 2022
TTHMHealth-based	Archived	Jul 1, 2022 to Sep 30, 2022

City summary

What the indexed records say

Madill has 1 published ZIP profile across Marshall County. The regional-evidence median is 296 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

Hard0 ZIPs

Very hard1 ZIP

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: 10.8 miles
Profiles with evidence: 1/1

Confidence labels

High: 0Moderate: 1Low: 0

Observation window: Aug 28, 2018 to Sep 17, 2025.

ZIP directory

Water reports in Madill

Open a ZIP for site-level provenance and measurements.

ZIP code

73446

Very Hard

296 PPM

Nearest site: 10.8 mi
Confidence: Moderate

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 Oklahoma communities

Beaver

Beaver County

293 PPM median

Drumright

Creek County

288 PPM median

Ada

Pontotoc County

305 PPM median

Stratford

Garvin County

305 PPM median

Tishomingo

Johnston County

275 PPM median

Perkins

Payne County

263 PPM median

Search all 108 Oklahoma cities →

Questions people ask

About water in Madill

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.