Utility-reported hardness
Unavailable
Ask your provider or test your tap
Local water dashboard
Official source aggregationWater quality in Flagstaff, AZ 86005
Regional hardness evidence, possible serving systems, EPA compliance history, and the measurements that are—and are not—available for Coconino County.
5 active health-based record(s) across possible systems
- Largest possible serving system
- Flagstaff City Of
- Source water
- Surface water + Groundwater
- County
- Coconino 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
Review needed
5 active health-based records
Measurements by utility
Each result belongs to a specific system.
Utility match
10 systems
Serves 79,796 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.
Flagstaff City Of
AZ0403008 · Surface water · 79,796 people served system-wide
The system names this served city; Census place overlap links the city to this 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
- Reported level
- 0.0036 mg/L
- Action level
- 0.015 mg/L
24% of the listed benchmark
Monitoring period: Jan 1, 2021 to Dec 31, 2023
Violation history (65)
| Rule | Status | Period |
|---|---|---|
| Revised Total Coliform Rule | Resolved | Jul 1, 2025 to Aug 12, 2025 |
| Surface Water Treatment Rule | Resolved | Jun 1, 2025 to Jun 30, 2025 |
| DICHLOROMETHANE | Resolved | Jan 1, 2024 to Dec 31, 2024 |
| Chlorite | Resolved | Jul 1, 2023 to Jul 31, 2023 |
| CARBON, TOTAL | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| 1,2,4-Trichlorobenzene | Resolved | Jan 1, 2023 to Jun 20, 2024 |
| cis-1,2-Dichloroethylene | Resolved | Jan 1, 2023 to Jun 20, 2024 |
| o-Dichlorobenzene | Resolved | Jan 1, 2023 to Jun 20, 2024 |
| Vinyl chloride | Resolved | Jan 1, 2023 to Jun 20, 2024 |
| 1,2-Dichloroethane | Resolved | Jan 1, 2023 to Jun 20, 2024 |
| Carbon tetrachloride | Resolved | Jan 1, 2023 to Jun 20, 2024 |
| 1,1,2-Trichloroethane | Resolved | Jan 1, 2023 to Jun 20, 2024 |
| CHLOROBENZENE | Resolved | Jan 1, 2023 to Jun 20, 2024 |
| Benzene | Resolved | Jan 1, 2023 to Jun 20, 2024 |
| Styrene | Resolved | Jan 1, 2023 to Jun 20, 2024 |
| trans-1,2-Dichloroethylene | Resolved | Jan 1, 2023 to Jun 20, 2024 |
| 1,1,1-Trichloroethane | Resolved | Jan 1, 2023 to Jun 20, 2024 |
| 1,2-Dichloropropane | Resolved | Jan 1, 2023 to Jun 20, 2024 |
| Xylenes, Total | Resolved | Jan 1, 2023 to Jun 20, 2024 |
| 1,1-Dichloroethylene | Resolved | Jan 1, 2023 to Jun 20, 2024 |
| Ethylbenzene | Resolved | Jan 1, 2023 to Jun 20, 2024 |
| Tetrachloroethylene | Resolved | Jan 1, 2023 to Jun 20, 2024 |
| Trichloroethylene | Resolved | Jan 1, 2023 to Jun 20, 2024 |
| Toluene | Resolved | Jan 1, 2023 to Jun 20, 2024 |
| DICHLOROMETHANE | Resolved | Jan 1, 2023 to Jun 20, 2024 |
| p-Dichlorobenzene | Resolved | Jan 1, 2023 to Jun 20, 2024 |
| Interim Enhanced Surface Water Treatment Rule | Resolved | Aug 1, 2022 to Aug 31, 2022 |
| Surface Water Treatment Rule | Resolved | Aug 1, 2022 to Aug 31, 2022 |
| CARBON, TOTAL | Resolved | Jul 1, 2022 to Sep 30, 2022 |
| Consumer Confidence Rule | Resolved | Jul 1, 2022 to Jul 12, 2022 |
| CARBON, TOTAL | Resolved | Apr 1, 2022 to Jun 30, 2022 |
| Gross Alpha, Excl. Radon and U | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| Combined Radium (-226 and -228) | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| Combined Uranium | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| Radium-228 | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| Radium-226 | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| Endrin | Resolved | Jan 1, 2021 to Dec 31, 2023 |
| Methoxychlor | Resolved | Jan 1, 2021 to Dec 31, 2023 |
| Dalapon | Resolved | Jan 1, 2021 to Dec 31, 2023 |
| Endothall | Resolved | Jan 1, 2021 to Dec 31, 2023 |
| Simazine | Resolved | Jan 1, 2021 to Dec 31, 2023 |
| Di(2-ethylhexyl) phthalate | Resolved | Jan 1, 2021 to Dec 31, 2023 |
| Picloram | Resolved | Jan 1, 2021 to Dec 31, 2023 |
| Dinoseb | Resolved | Jan 1, 2021 to Dec 31, 2023 |
| Hexachlorocyclopentadiene | Resolved | Jan 1, 2021 to Dec 31, 2023 |
| Atrazine | Resolved | Jan 1, 2021 to Dec 31, 2023 |
| LASSO | Resolved | Jan 1, 2021 to Dec 31, 2023 |
| Heptachlor | Resolved | Jan 1, 2021 to Dec 31, 2023 |
| Heptachlor epoxide | Resolved | Jan 1, 2021 to Dec 31, 2023 |
| 2,4-D | Resolved | Jan 1, 2021 to Dec 31, 2023 |
| 2,4,5-TP | Resolved | Jan 1, 2021 to Dec 31, 2023 |
| HEXACHLOROBENZENE | Resolved | Jan 1, 2021 to Dec 31, 2023 |
| Pentachlorophenol | Resolved | Jan 1, 2021 to Dec 31, 2023 |
| 1,2-DIBROMO-3-CHLOROPROPANE | Resolved | Jan 1, 2021 to Dec 31, 2023 |
| ETHYLENE DIBROMIDE | Resolved | Jan 1, 2021 to Dec 31, 2023 |
| OXAMYL | Resolved | Jan 1, 2021 to Dec 31, 2023 |
| Carbofuran | Resolved | Jan 1, 2021 to Dec 31, 2023 |
| Glyphosate | Resolved | Jan 1, 2021 to Dec 31, 2023 |
| BHC-GAMMA | Resolved | Jan 1, 2021 to Dec 31, 2023 |
| 2,3,7,8-TCDD | Resolved | Jan 1, 2021 to Dec 31, 2023 |
| Chlordane | Resolved | Jan 1, 2021 to Dec 31, 2023 |
| Diquat | Resolved | Jan 1, 2021 to Dec 31, 2023 |
| Benzo(a)pyrene | Resolved | Jan 1, 2021 to Dec 31, 2023 |
| Di(2-ethylhexyl) adipate | Resolved | Jan 1, 2021 to Dec 31, 2023 |
| Toxaphene | Resolved | Jan 1, 2021 to Dec 31, 2023 |
Doney Park Water
AZ0403005 · Groundwater · 8,996 people served system-wide
The system names this served city; Census place overlap links the city to this 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
- Reported level
- 0 mg/L
- Action level
- 0.015 mg/L
0% of the listed benchmark
Monitoring period: Jan 1, 2022 to Dec 31, 2024
Violation history (3)
| Rule | Status | Period |
|---|---|---|
| Revised Total Coliform Rule | Resolved | Feb 1, 2023 to Mar 31, 2023 |
| E. COLI | Resolved | Oct 20, 2022 to Dec 2, 2022 |
| Consumer Confidence Rule | Unaddressed | Jul 1, 2002 |
Kachina Village Dwid
AZ0403013 · Groundwater · 3,500 people served system-wide
The system names this served city; Census place overlap links the city to this 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
- Reported level
- 0 mg/L
- Action level
- 0.015 mg/L
0% of the listed benchmark
Monitoring period: Jan 1, 2025 to Dec 31, 2025
Violation history (2)
| Rule | Status | Period |
|---|---|---|
| Revised Total Coliform Rule | Resolved | Jun 1, 2024 to Jul 29, 2024 |
| Lead and Copper Rule | Resolved | Oct 1, 2021 to Sep 8, 2022 |
Forest Highlands Water Company
AZ0403073 · Groundwater · 1,668 people served system-wide
The system names this served city; Census place overlap links the city to this 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
- Reported level
- 0 mg/L
- Action level
- 0.015 mg/L
0% of the listed benchmark
Monitoring period: Jan 1, 2021 to Dec 31, 2023
Violation history (3)
| Rule | Status | Period |
|---|---|---|
| Consumer Confidence Rule | Resolved | Jul 1, 2025 to Jul 22, 2025 |
| Revised Total Coliform Rule | Resolved | Mar 1, 2025 to Apr 30, 2025 |
| Consumer Confidence Rule | Resolved | Oct 2, 2022 to Oct 31, 2022 |
Ponderosa Utility Corp
AZ0403018 · Groundwater · 1,585 people served system-wide
The system names this served city; Census place overlap links the city to this 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
- Reported level
- 0 mg/L
- Action level
- 0.015 mg/L
0% of the listed benchmark
Monitoring period: Jan 1, 2023 to Dec 31, 2025
Violation history (4)
| Rule | Status | Period |
|---|---|---|
| Groundwater RuleHealth-based | Resolved | Jul 31, 2024 to Sep 26, 2024 |
| Groundwater RuleHealth-based | Resolved | May 17, 2024 to May 22, 2024 |
| Revised Total Coliform RuleHealth-based | Resolved | Oct 9, 2023 to Apr 17, 2024 |
| Lead and Copper Rule | Resolved | Jan 1, 2023 to Apr 26, 2024 |
Hidden Hollow Mhc
AZ0403362 · Groundwater · 400 people served system-wide
The system names this served city; Census place overlap links the city to this ZCTA.
1 reported active health-based record(s) for this system
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
- Reported level
- 0 mg/L
- Action level
- 0.015 mg/L
0% of the listed benchmark
Monitoring period: Jan 1, 2022 to Dec 31, 2024
Violation history (4)
| Rule | Status | Period |
|---|---|---|
| Lead and Copper Rule | Resolved | Sep 8, 2024 to Sep 9, 2024 |
| Revised Total Coliform Rule | Resolved | Jun 1, 2024 to Jul 26, 2024 |
| Arsenic | Resolved | Oct 1, 2022 to Dec 31, 2022 |
| Revised Total Coliform RuleHealth-based | Unaddressed | Aug 23, 2021 |
Cs Flagstaff Ranch Water Company
AZ0403088 · Groundwater · 350 people served system-wide
The system names this served city; Census place overlap links the city to this ZCTA.
4 reported active health-based record(s) for this system
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
- Reported level
- 0 mg/L
- Action level
- 0.015 mg/L
0% of the listed benchmark
Monitoring period: Jan 1, 2024 to Dec 31, 2024
Violation history (24)
| Rule | Status | Period |
|---|---|---|
| Lead and Copper Rule | Unaddressed | Jan 1, 2026 |
| Lead and Copper Rule | Unaddressed | Oct 1, 2025 |
| Arsenic | Resolved | Jul 1, 2025 to Sep 30, 2025 |
| Arsenic | Resolved | Jul 1, 2025 to Sep 30, 2025 |
| Consumer Confidence Rule | Resolved | Jul 1, 2025 to Oct 16, 2025 |
| Lead and Copper Rule | Resolved | Jan 1, 2025 to Jul 2, 2025 |
| Public Notice | Resolved | Dec 1, 2024 to Jul 16, 2025 |
| LEAD AND COPPER RULE REVISIONS | Resolved | Oct 17, 2024 to Nov 4, 2024 |
| Public Notice | Resolved | Oct 2, 2024 to Jul 16, 2025 |
| Consumer Confidence Rule | Resolved | Oct 2, 2024 to Jul 24, 2025 |
| Arsenic | Resolved | Jul 1, 2024 to Sep 30, 2024 |
| Arsenic | Resolved | Jul 1, 2024 to Sep 30, 2024 |
| Public Notice | Resolved | Apr 2, 2024 to Jul 16, 2025 |
| Revised Total Coliform RuleHealth-based | Unaddressed | Dec 13, 2023 |
| Consumer Confidence Rule | Resolved | Oct 2, 2023 to Jul 24, 2025 |
| Lead and Copper Rule | Resolved | Oct 1, 2023 to Oct 3, 2024 |
| Revised Total Coliform Rule | Resolved | Oct 1, 2023 to Oct 31, 2023 |
| Lead and Copper Rule | Resolved | Jan 1, 2023 to Jul 2, 2025 |
| Arsenic | Resolved | Jan 1, 2023 to Mar 31, 2023 |
| Public Notice | Resolved | Nov 25, 2022 to Jul 16, 2025 |
| Lead and Copper Rule | Resolved | Oct 1, 2021 to Jun 28, 2023 |
| Groundwater RuleHealth-based | Unaddressed | Sep 16, 2019 |
| Groundwater RuleHealth-based | Unaddressed | Aug 17, 2019 |
| Groundwater RuleHealth-based | Unaddressed | Aug 17, 2019 |
Mountain Dell Water Inc
AZ0403015 · Groundwater · 250 people served system-wide
The system names this served city; Census place overlap links the city to this 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
- Reported level
- 0 mg/L
- Action level
- 0.015 mg/L
0% of the listed benchmark
Monitoring period: Jan 1, 2023 to Dec 31, 2025
Violation history (7)
| Rule | Status | Period |
|---|---|---|
| Consumer Confidence Rule | Resolved | Jul 1, 2025 to Jul 31, 2025 |
| Public Notice | Resolved | Dec 1, 2024 to Nov 21, 2024 |
| Groundwater RuleHealth-based | Resolved | May 19, 2024 to Jun 3, 2024 |
| Revised Total Coliform Rule | Resolved | Feb 1, 2024 to Feb 29, 2024 |
| Consumer Confidence Rule | Resolved | Oct 2, 2023 to Oct 20, 2023 |
| Revised Total Coliform Rule | Resolved | Oct 1, 2023 to Oct 31, 2023 |
| Consumer Confidence Rule | Resolved | Jul 1, 2022 to Jul 14, 2022 |
Cs West Village Water Company
AZ0403021 · Groundwater · 210 people served system-wide
The system names this served city; Census place overlap links the city to this 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
- Reported level
- 0 mg/L
- Action level
- 0.015 mg/L
0% of the listed benchmark
Monitoring period: Jan 1, 2023 to Dec 31, 2025
Violation history (12)
| Rule | Status | Period |
|---|---|---|
| Arsenic | Resolved | Jul 1, 2025 to Sep 30, 2025 |
| Revised Total Coliform Rule | Resolved | Dec 1, 2023 to Dec 31, 2023 |
| Groundwater RuleHealth-based | Resolved | Oct 7, 2023 to Oct 19, 2023 |
| Consumer Confidence Rule | Resolved | Oct 2, 2023 to Feb 20, 2024 |
| Chlorine | Resolved | Oct 1, 2023 to Dec 31, 2023 |
| Revised Total Coliform Rule | Resolved | Aug 1, 2023 to Sep 27, 2023 |
| Arsenic | Resolved | Jan 1, 2023 to Mar 31, 2023 |
| Public Notice | Resolved | Nov 25, 2022 to Feb 20, 2024 |
| Chlorine | Resolved | Jul 1, 2022 to Sep 30, 2022 |
| Chlorine | Resolved | Jan 1, 2022 to Mar 31, 2022 |
| Lead and Copper Rule | Resolved | Oct 1, 2021 to Nov 7, 2023 |
| Chlorine | Resolved | Oct 1, 2021 to Dec 31, 2021 |
Lake Mary Country Store
AZ0403067 · Groundwater · 130 people served system-wide
The system names this served city; Census place overlap links the city to this 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
- Reported level
- 0 mg/L
- Action level
- 0.015 mg/L
0% of the listed benchmark
Monitoring period: Jan 1, 2025 to Dec 31, 2025
Violation history (11)
| Rule | Status | Period |
|---|---|---|
| Lead and Copper Rule | Unaddressed | Jan 1, 2026 |
| Public Notice | Unaddressed | Oct 18, 2025 |
| Consumer Confidence Rule | Resolved | Jul 1, 2025 to Oct 1, 2025 |
| Lead and Copper Rule | Resolved | Jan 1, 2025 to Jun 12, 2025 |
| LEAD AND COPPER RULE REVISIONS | Resolved | Oct 17, 2024 to Nov 16, 2024 |
| LEAD AND COPPER RULE REVISIONSHealth-based | Resolved | Oct 17, 2024 to Nov 16, 2024 |
| Consumer Confidence Rule | Resolved | Oct 2, 2023 to Jun 12, 2024 |
| Public Notice | Resolved | Nov 25, 2022 to Jun 12, 2025 |
| Consumer Confidence Rule | Resolved | Oct 2, 2022 to Oct 21, 2022 |
| Public Notice | Resolved | Oct 31, 2021 to Dec 28, 2021 |
| Lead and Copper Rule | Resolved | Oct 1, 2021 to Oct 4, 2022 |
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
An active health-based record is present. Follow the utility's current notice and public-health instructions.
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 →Nearby indexed reports
More local profiles in Flagstaff
Estimates can differ across a city because monitoring locations and associated systems differ.
Frequently asked
Water questions for Flagstaff
Is tap water safe in Flagstaff?+
EPA ECHO reports 5 active health-based violations among the associated community water systems. Review the affected utility's current notice and Consumer Confidence Report.
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.