Utility-reported hardness
Unavailable
Ask your provider or test your tap
Local water dashboard
Official source aggregationRegional hardness evidence, possible serving systems, EPA compliance history, and the measurements that are—and are not—available for Yukon-Koyukuk Census Area.
Your tap water
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
EPA quarter 2026Q2
Utility-reported hardness
Unavailable
Ask your provider or test your tap
All possible systems
Review needed
3 active health-based records
Measurements by utility
Each result belongs to a specific system.
Utility match
2 systems
Serves 490 people system-wide
Match the name on your water bill
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.
AK2360272 · Groundwater · 490 people served system-wide
The system names this served city; Census place overlap links the city to this ZCTA.
3 reported active health-based record(s) for this system
Find this utility’s official report →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.
EPA SDWIS Lead and Copper Rule samples
24% of the listed benchmark
Monitoring period: Jul 1, 2025 to Dec 31, 2025
EPA SDWIS Lead and Copper Rule samples
154% of the listed benchmark
Monitoring period: Jan 1, 2016 to Dec 31, 2018
EPA SDWIS reported health-based violation
125% of the listed benchmark
Monitoring period: Jan 1, 2023 to Mar 31, 2023
EPA SDWIS reported health-based violation
106% of the listed benchmark
Monitoring period: Oct 1, 2022 to Dec 31, 2022
| Rule | Status | Period |
|---|---|---|
| Chlorine | Resolved | Jan 1, 2026 to Jan 31, 2026 |
| Chlorine | Resolved | Dec 1, 2025 to Dec 31, 2025 |
| Groundwater RuleHealth-based | Unaddressed | Nov 2, 2025 |
| Groundwater RuleHealth-based | Unaddressed | Nov 2, 2025 |
| Chlorine | Resolved | Nov 1, 2025 to Nov 30, 2025 |
| Chlorine | Resolved | Jun 1, 2025 to Jun 30, 2025 |
| Groundwater RuleHealth-based | Resolved | Aug 7, 2024 to Dec 29, 2025 |
| Groundwater RuleHealth-based | Unaddressed | Aug 7, 2024 |
| Consumer Confidence Rule | Resolved | Jul 1, 2024 to Jul 2, 2024 |
| Chlorine | Resolved | Apr 1, 2024 to Apr 30, 2024 |
| Chlorine | Resolved | Oct 1, 2023 to Dec 11, 2023 |
| Revised Total Coliform Rule | Resolved | Sep 1, 2023 to Sep 30, 2023 |
| Revised Total Coliform Rule | Resolved | Aug 1, 2023 to Aug 31, 2023 |
| Chlorine | Resolved | Jul 1, 2023 to Sep 30, 2023 |
| Public Notice | Resolved | Jan 1, 2023 to Jul 2, 2024 |
| Lead and Copper Rule | Resolved | Jan 1, 2023 to Feb 22, 2023 |
| Total Haloacetic Acids (HAA5)Health-based | Resolved | Jan 1, 2023 to Mar 31, 2023 |
| Total Haloacetic Acids (HAA5)Health-based | Resolved | Oct 1, 2022 to Dec 31, 2022 |
| TTHMHealth-based | Resolved | Oct 1, 2022 to Dec 31, 2022 |
| Lead and Copper Rule | Resolved | Jul 1, 2022 to Feb 22, 2023 |
| Total Haloacetic Acids (HAA5)Health-based | Resolved | Jul 1, 2022 to Sep 30, 2022 |
| TTHMHealth-based | Resolved | Jul 1, 2022 to Sep 30, 2022 |
| TTHMHealth-based | Resolved | Apr 1, 2022 to Jun 30, 2022 |
| Total Haloacetic Acids (HAA5)Health-based | Resolved | Apr 1, 2022 to Jun 30, 2022 |
| TTHMHealth-based | Resolved | Jan 1, 2022 to Mar 31, 2022 |
| Lead and Copper Rule | Resolved | Jan 1, 2022 to Feb 22, 2023 |
| Total Haloacetic Acids (HAA5)Health-based | Resolved | Jan 1, 2022 to Mar 31, 2022 |
| TTHMHealth-based | Resolved | Oct 1, 2021 to Dec 31, 2021 |
| Total Haloacetic Acids (HAA5)Health-based | Resolved | Oct 1, 2021 to Dec 31, 2021 |
| Total Haloacetic Acids (HAA5)Health-based | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| TTHMHealth-based | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| Lead and Copper Rule | Resolved | Jul 1, 2021 to Feb 22, 2023 |
| Total Haloacetic Acids (HAA5)Health-based | Resolved | Apr 1, 2021 to Jun 30, 2021 |
| TTHMHealth-based | Resolved | Apr 1, 2021 to Jun 30, 2021 |
| Total Haloacetic Acids (HAA5)Health-based | Resolved | Jan 1, 2021 to Mar 31, 2021 |
| TTHMHealth-based | Resolved | Jan 1, 2021 to Mar 31, 2021 |
| Lead and Copper Rule | Resolved | Jan 1, 2021 to Feb 22, 2023 |
AK2360159 · Groundwater · 290 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 →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.
EPA SDWIS Lead and Copper Rule samples
73% of the listed benchmark
Monitoring period: Jan 1, 2024 to Jun 30, 2024
EPA SDWIS Lead and Copper Rule samples
115% of the listed benchmark
Monitoring period: Jan 1, 2023 to Jun 30, 2023
| Rule | Status | Period |
|---|---|---|
| Chlorine | Archived | Mar 1, 2026 to Mar 31, 2026 |
| Revised Total Coliform Rule | Resolved | Oct 1, 2025 to Oct 31, 2025 |
| Chlorine | Resolved | Oct 1, 2025 to Oct 31, 2025 |
| Chlorine | Resolved | Jul 1, 2025 to Jul 31, 2025 |
| Revised Total Coliform Rule | Resolved | Jul 1, 2025 to Jul 31, 2025 |
| Chlorine | Resolved | Jun 1, 2025 to Jun 30, 2025 |
| Revised Total Coliform Rule | Resolved | Jun 1, 2025 to Jun 30, 2025 |
| Revised Total Coliform Rule | Resolved | Mar 1, 2025 to Mar 31, 2025 |
| Chlorine | Resolved | Mar 1, 2025 to Mar 31, 2025 |
| Chlorine | Resolved | Jan 1, 2025 to Jan 31, 2025 |
| Revised Total Coliform Rule | Resolved | Jan 1, 2025 to Jan 31, 2025 |
| Lead and Copper Rule | Resolved | Oct 3, 2024 to Nov 21, 2024 |
| Lead and Copper Rule | Resolved | Jul 31, 2024 to Nov 21, 2024 |
| Consumer Confidence Rule | Resolved | Jul 1, 2024 to Jul 2, 2024 |
| Chlorine | Resolved | Apr 1, 2024 to Apr 30, 2024 |
| Revised Total Coliform Rule | Resolved | Dec 1, 2023 to Dec 31, 2023 |
| Chlorine | Resolved | Oct 1, 2023 to Dec 31, 2023 |
| Lead and Copper Rule | Unaddressed | Jul 1, 2022 |
| Revised Total Coliform Rule | Resolved | Jun 1, 2022 to Jun 30, 2022 |
| Chlorine | Resolved | Apr 1, 2022 to Jun 30, 2022 |
| Revised Total Coliform Rule | Resolved | Feb 1, 2022 to Feb 28, 2022 |
| Lead and Copper Rule | Unaddressed | Jan 1, 2022 |
| Lead and Copper Rule | Unaddressed | Jul 1, 2021 |
Hardness estimate unavailable
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
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.
ZIP boundaries and utility service areas do not perfectly match. Verify the system on a water bill before relying on system-wide records.
An active health-based record is present. Follow the utility's current notice and public-health instructions.
Find an official utility report →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
EPA ECHO reports 3 active health-based violations among the associated community water systems. Review the affected utility's current notice and Consumer Confidence Report.
Utility-reported hardness is unavailable in this index. Regional samples do not establish tap-water hardness. Ask your provider or test your tap.
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.