City water profile

Water hardness in Flagstaff

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

Utility-reported hardness

Not yet available

Check your provider and source →

State comparison: Unavailable
Evidence comparison rank: —
Matched utilities: 10
Active health records: 5

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.

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

Below action level

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)

Imported violation history for Flagstaff City Of
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

Below action level

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)

Imported violation history for Doney Park Water
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

Below action level

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)

Imported violation history for Kachina Village Dwid
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

Below action level

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)

Imported violation history for Forest Highlands Water Company
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

Below action level

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)

Imported violation history for Ponderosa Utility Corp
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

Below action level

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)

Imported violation history for Hidden Hollow Mhc
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

Below action level

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)

Imported violation history for Cs Flagstaff Ranch Water Company
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

Below action level

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)

Imported violation history for Mountain Dell Water Inc
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

Below action level

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)

Imported violation history for Cs West Village Water Company
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

Below action level

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)

Imported violation history for Lake Mary Country Store
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

City summary

What the indexed records say

Flagstaff has 3 published ZIP profiles across Coconino County. No qualifying nearby hardness observation is available for the city.

The —–— PPM range shows how much the available ZIP estimates vary within the city label.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs

Moderately hard0 ZIPs

Hard0 ZIPs

Very hard0 ZIPs

0 of 3 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: 0/3

Confidence labels

High: 0Moderate: 0Low: 0

Observation window: unavailable to unavailable.

ZIP directory

Water reports in Flagstaff

Open a ZIP for site-level provenance and measurements.

ZIP code

86004

No estimate

—

Nearest site: — mi
Confidence: —

View full ZIP evidence →

ZIP code

86005

No estimate

—

Nearest site: — mi
Confidence: —

View full ZIP evidence →

ZIP code

86011

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

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Questions people ask

About water in Flagstaff

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.