Utility-reported hardness
Unavailable
Ask your provider or test your tap
Local water dashboard
Official source aggregationWater quality in Fairfax, OK 74637
Regional hardness evidence, possible serving systems, EPA compliance history, and the measurements that are—and are not—available for Osage County.
Historical measurement record needs context
- Largest possible serving system
- Fairfax
- Source water
- Surface water
- County
- Osage County
- Profile updated
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 →At a glance
What the current records say
EPA quarter 2026Q2
All possible systems
No active flag
0 active health-based records
Measurements by utility
Each result belongs to a specific system.
Utility match
1 system
Serves 1,555 people system-wide
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
- 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 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 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)
| 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 |
Hardness estimate unavailable
No responsible local estimate yet
We did not find enough qualifying recent USGS hardness observations within 25 miles of this ZIP centroid. We leave the value blank instead of substituting a state average. Ask the serving utility or test the household tap for a property-specific result.
Evidence-first next steps
Confirm the problem before choosing treatment
This profile can help you ask the right question. It cannot select equipment for a property without a current result from the serving utility or the tap.
Confirm the serving system
ZIP boundaries and utility service areas do not perfectly match. Verify the system on a water bill before relying on system-wide records.
Read the current utility report
Use the current Consumer Confidence Report for treated-water results and official notices.
Find an official utility report →Test for the decision you face
Ask the utility for hardness or test at the tap. For health concerns, use a certified laboratory and targeted analysis.
Convert your hardness test result →Frequently asked
Water questions for Fairfax
Is tap water safe in Fairfax?+
EPA ECHO shows no active health-based violation for the associated systems in this reporting snapshot. This does not prove every contaminant is absent; federal records can lag and household plumbing can change tap conditions.
How hard is the water?+
Utility-reported hardness is unavailable in this index. Regional samples do not establish tap-water hardness. Ask your provider or test your tap.
Do I need a water softener?+
Confirm hardness at your tap and consider actual scale or spotting before choosing treatment. Regional environmental values cannot determine whether you need a softener. A softener addresses hardness, not every contaminant.