City water profile

Water hardness in Fairfax

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

Fairfax

OK1021204 · Surface water · 1,555 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: 0.0023 mg/L
Action level: 0.015 mg/L

15% of the listed benchmark

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

TTHM

EPA SDWIS reported health-based violation

Reported violation

Reported level: 0.081 MG/L
Maximum contaminant level: 0.08 MG/L

101% of the listed benchmark

Monitoring period: Oct 1, 2023 to Dec 31, 2023

Total Haloacetic Acids (HAA5)

EPA SDWIS reported health-based violation

Reported violation

Reported level: 0.062 MG/L
Maximum contaminant level: 0.06 MG/L

103% of the listed benchmark

Monitoring period: Jan 1, 2022 to Mar 31, 2022

Violation history (79)

Imported violation history for Fairfax
Rule	Status	Period
CARBON, TOTALHealth-based	Resolved	Jul 1, 2024 to Sep 30, 2024
CARBON, TOTALHealth-based	Resolved	Apr 1, 2024 to Jun 30, 2024
CARBON, TOTALHealth-based	Resolved	Jan 1, 2024 to Mar 31, 2024
CARBON, TOTALHealth-based	Resolved	Oct 1, 2023 to Dec 31, 2023
TTHMHealth-based	Archived	Oct 1, 2023 to Dec 31, 2023
TTHMHealth-based	Resolved	Jul 1, 2023 to Sep 30, 2023
CARBON, TOTALHealth-based	Archived	Jul 1, 2023 to Sep 30, 2023
TTHMHealth-based	Archived	Jul 1, 2023 to Sep 30, 2023
TTHMHealth-based	Resolved	Apr 1, 2023 to Jun 30, 2023
TTHMHealth-based	Resolved	Apr 1, 2023 to Jun 30, 2023
CARBON, TOTALHealth-based	Resolved	Apr 1, 2023 to Jun 30, 2023
TTHMHealth-based	Resolved	Jan 1, 2023 to Mar 31, 2023
TTHMHealth-based	Archived	Jan 1, 2023 to Mar 31, 2023
CARBON, TOTALHealth-based	Resolved	Jan 1, 2023 to Mar 31, 2023
TTHMHealth-based	Archived	Oct 1, 2022 to Dec 31, 2022
CARBON, TOTALHealth-based	Archived	Oct 1, 2022 to Dec 31, 2022
Gross Alpha, Excl. Radon and U	Resolved	Oct 1, 2022 to Dec 31, 2022
TTHMHealth-based	Resolved	Oct 1, 2022 to Dec 31, 2022
Combined Uranium	Resolved	Oct 1, 2022 to Dec 31, 2022
Combined Radium (-226 and -228)	Resolved	Oct 1, 2022 to Dec 31, 2022
Gross Beta Particle Activity	Resolved	Oct 1, 2022 to Dec 31, 2022
TTHMHealth-based	Resolved	Jul 1, 2022 to Sep 30, 2022
CARBON, TOTALHealth-based	Resolved	Jul 1, 2022 to Sep 30, 2022
TTHMHealth-based	Resolved	Jul 1, 2022 to Sep 30, 2022
Lead and Copper Rule	Resolved	Jul 1, 2022 to Nov 28, 2022
Combined Uranium	Resolved	Apr 1, 2022 to Jun 30, 2022
Combined Radium (-226 and -228)	Resolved	Apr 1, 2022 to Jun 30, 2022
Gross Beta Particle Activity	Resolved	Apr 1, 2022 to Jun 30, 2022
TTHMHealth-based	Archived	Apr 1, 2022 to Jun 30, 2022
TTHMHealth-based	Resolved	Apr 1, 2022 to Jun 30, 2022
TTHM	Resolved	Apr 1, 2022 to Jun 8, 2022
Gross Alpha, Excl. Radon and U	Resolved	Apr 1, 2022 to Jun 30, 2022
Lead and Copper Rule	Resolved	Jan 1, 2022 to Nov 28, 2022
Gross Alpha, Excl. Radon and U	Resolved	Jan 1, 2022 to Mar 31, 2022
Combined Uranium	Resolved	Jan 1, 2022 to Mar 31, 2022
Gross Beta Particle Activity	Resolved	Jan 1, 2022 to Mar 31, 2022
Total Haloacetic Acids (HAA5)Health-based	Resolved	Jan 1, 2022 to Mar 31, 2022
TTHMHealth-based	Resolved	Jan 1, 2022 to Mar 31, 2022
TTHMHealth-based	Archived	Jan 1, 2022 to Mar 31, 2022
Combined Radium (-226 and -228)	Resolved	Jan 1, 2022 to Mar 31, 2022
Total Haloacetic Acids (HAA5)Health-based	Resolved	Oct 1, 2021 to Dec 31, 2021
Total Haloacetic Acids (HAA5)Health-based	Archived	Oct 1, 2021 to Dec 31, 2021
TTHMHealth-based	Resolved	Oct 1, 2021 to Dec 31, 2021
TTHMHealth-based	Resolved	Oct 1, 2021 to Dec 31, 2021
1,2,4-Trichlorobenzene	Resolved	Oct 1, 2021 to Dec 31, 2021
cis-1,2-Dichloroethylene	Resolved	Oct 1, 2021 to Dec 31, 2021
Xylenes, Total	Resolved	Oct 1, 2021 to Dec 31, 2021
DICHLOROMETHANE	Resolved	Oct 1, 2021 to Dec 31, 2021
p-Dichlorobenzene	Resolved	Oct 1, 2021 to Dec 31, 2021
Vinyl chloride	Resolved	Oct 1, 2021 to Dec 31, 2021
1,1-Dichloroethylene	Resolved	Oct 1, 2021 to Dec 31, 2021
1,2-Dichloroethane	Resolved	Oct 1, 2021 to Dec 31, 2021
1,1,1-Trichloroethane	Resolved	Oct 1, 2021 to Dec 31, 2021
Carbon tetrachloride	Resolved	Oct 1, 2021 to Dec 31, 2021
1,2-Dichloropropane	Resolved	Oct 1, 2021 to Dec 31, 2021
Trichloroethylene	Resolved	Oct 1, 2021 to Dec 31, 2021
1,1,2-Trichloroethane	Resolved	Oct 1, 2021 to Dec 31, 2021
CHLOROBENZENE	Resolved	Oct 1, 2021 to Dec 31, 2021
Benzene	Resolved	Oct 1, 2021 to Dec 31, 2021
Toluene	Resolved	Oct 1, 2021 to Dec 31, 2021
Styrene	Resolved	Oct 1, 2021 to Dec 31, 2021
o-Dichlorobenzene	Resolved	Oct 1, 2021 to Dec 31, 2021
Tetrachloroethylene	Resolved	Oct 1, 2021 to Dec 31, 2021
Ethylbenzene	Resolved	Oct 1, 2021 to Dec 31, 2021
trans-1,2-Dichloroethylene	Resolved	Oct 1, 2021 to Dec 31, 2021
Lead and Copper Rule	Resolved	Jul 1, 2021 to Nov 28, 2022
Total Haloacetic Acids (HAA5)Health-based	Resolved	Jul 1, 2021 to Sep 30, 2021
Total Haloacetic Acids (HAA5)Health-based	Archived	Jul 1, 2021 to Sep 30, 2021
TTHMHealth-based	Resolved	Jul 1, 2021 to Sep 30, 2021
TTHMHealth-based	Resolved	Jul 1, 2021 to Sep 30, 2021
CARBON, TOTALHealth-based	Resolved	Jul 1, 2021 to Sep 30, 2021
Total Haloacetic Acids (HAA5)	Resolved	Jun 30, 2021 to Oct 28, 2021
Total Haloacetic Acids (HAA5)Health-based	Resolved	Apr 1, 2021 to Jun 30, 2021
Total Haloacetic Acids (HAA5)Health-based	Archived	Apr 1, 2021 to Jun 30, 2021
TTHMHealth-based	Archived	Apr 1, 2021 to Jun 30, 2021
CARBON, TOTALHealth-based	Resolved	Apr 1, 2021 to Jun 30, 2021
TTHMHealth-based	Resolved	Apr 1, 2021 to Jun 30, 2021
CARBON, TOTALHealth-based	Resolved	Jan 1, 2021 to Mar 31, 2021
Nitrate-Nitrite	Resolved	Jan 1, 2021 to Dec 31, 2021

City summary

What the indexed records say

Fairfax has 1 published ZIP profile across Osage County. No qualifying nearby hardness observation is available for the city.

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 hard0 ZIPs

0 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: — miles
Profiles with evidence: 0/1

Confidence labels

High: 0Moderate: 0Low: 0

Observation window: unavailable to unavailable.

ZIP directory

Water reports in Fairfax

Open a ZIP for site-level provenance and measurements.

ZIP code

74637

No estimate

—

Nearest site: — mi
Confidence: —

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

Barnsdall

Osage County

— No median

Hominy

Osage County

— No median

Pawhuska

Osage County

— No median

Ada

Pontotoc County

305 PPM median

Ardmore

Carter County

419 PPM median

Arkoma

Le Flore County

46 PPM median

Search all 108 Oklahoma cities →

Questions people ask

About water in Fairfax

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.