Utility-reported hardness
Unavailable
Ask your provider or test your tap
Local water dashboard
Official source aggregationWater quality in Adak, AK 99546
Regional hardness evidence, possible serving systems, EPA compliance history, and the measurements that are—and are not—available for Aleutians West Census Area.
1 active health-based record(s) across possible systems
- Largest possible serving system
- Adak Utilities
- Source water
- Surface water
- County
- Aleutians West Census Area
- 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
1 active health-based record
Measurements by utility
Each result belongs to a specific system.
Utility match
1 system
Serves 325 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.
Adak Utilities
AK2260595 · Surface water · 325 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 (2)
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
- 0.013 mg/L
- Action level
- 0.015 mg/L
87% of the listed benchmark
Monitoring period: Jan 1, 2024 to Dec 31, 2024
Copper (90th percentile)
EPA SDWIS Lead and Copper Rule samples
- Reported level
- 1.41 mg/L
- Action level
- 1.3 mg/L
108% of the listed benchmark
Monitoring period: Jul 1, 2013 to Dec 31, 2013
Violation history (52)
| Rule | Status | Period |
|---|---|---|
| Revised Total Coliform Rule | Archived | Feb 1, 2026 to Feb 28, 2026 |
| Surface Water Treatment Rule | Archived | Jan 1, 2026 to Jan 31, 2026 |
| Chlorine | Resolved | Dec 1, 2025 to Dec 31, 2025 |
| Surface Water Treatment Rule | Resolved | Dec 1, 2025 to Dec 31, 2025 |
| Revised Total Coliform Rule | Resolved | Dec 1, 2025 to Dec 31, 2025 |
| Revised Total Coliform Rule | Resolved | Nov 1, 2025 to Nov 30, 2025 |
| Surface Water Treatment Rule | Archived | Nov 1, 2025 to Nov 30, 2025 |
| Chlorine | Resolved | Nov 1, 2025 to Nov 30, 2025 |
| Revised Total Coliform Rule | Resolved | Oct 1, 2025 to Oct 31, 2025 |
| Surface Water Treatment Rule | Resolved | Oct 1, 2025 to Oct 31, 2025 |
| Chlorine | Resolved | Oct 1, 2025 to Oct 31, 2025 |
| Chlorine | Resolved | Sep 1, 2025 to Sep 30, 2025 |
| Surface Water Treatment Rule | Resolved | Sep 1, 2025 to Sep 30, 2025 |
| Chlorine | Resolved | Jul 1, 2025 to Jul 31, 2025 |
| Surface Water Treatment Rule | Resolved | Jul 1, 2025 to Jul 31, 2025 |
| Surface Water Treatment RuleHealth-based | Resolved | May 1, 2025 to May 31, 2025 |
| Chlorine | Resolved | Apr 1, 2025 to Apr 30, 2025 |
| Surface Water Treatment Rule | Resolved | Apr 1, 2025 to Apr 30, 2025 |
| Surface Water Treatment RuleHealth-based | Resolved | Apr 1, 2025 to Apr 30, 2025 |
| Surface Water Treatment Rule | Resolved | Mar 1, 2025 to Mar 31, 2025 |
| Chlorine | Resolved | Mar 1, 2025 to Mar 31, 2025 |
| Chlorine | Resolved | Feb 1, 2025 to Feb 28, 2025 |
| Surface Water Treatment Rule | Resolved | Feb 1, 2025 to Feb 28, 2025 |
| Surface Water Treatment RuleHealth-based | Resolved | Jan 1, 2025 to Jan 31, 2025 |
| Surface Water Treatment Rule | Resolved | Dec 1, 2024 to Dec 31, 2024 |
| Surface Water Treatment Rule | Resolved | Jun 1, 2024 to Jun 30, 2024 |
| Surface Water Treatment RuleHealth-based | Resolved | May 1, 2024 to May 31, 2024 |
| Surface Water Treatment Rule | Resolved | Apr 1, 2024 to Apr 30, 2024 |
| Surface Water Treatment Rule | Resolved | Dec 1, 2023 to Dec 31, 2023 |
| Surface Water Treatment Rule | Resolved | Nov 1, 2023 to Nov 30, 2023 |
| Consumer Confidence Rule | Resolved | Oct 1, 2023 to Jul 8, 2024 |
| Surface Water Treatment RuleHealth-based | Resolved | Oct 1, 2023 to Oct 31, 2023 |
| Chlorine | Resolved | Oct 1, 2023 to Dec 13, 2023 |
| Revised Total Coliform Rule | Resolved | Aug 1, 2023 to Aug 31, 2023 |
| Surface Water Treatment Rule | Resolved | Aug 1, 2023 to Aug 31, 2023 |
| Consumer Confidence Rule | Resolved | Jul 1, 2023 to Aug 16, 2023 |
| Consumer Confidence Rule | Resolved | Jul 1, 2023 to Jun 19, 2024 |
| Chlorine | Resolved | Jul 1, 2023 to Sep 30, 2023 |
| Surface Water Treatment Rule | Resolved | Nov 1, 2022 to Nov 30, 2022 |
| Consumer Confidence Rule | Resolved | Oct 1, 2022 to Jul 8, 2024 |
| Surface Water Treatment Rule | Resolved | Oct 1, 2022 to Oct 31, 2022 |
| Chlorine | Resolved | Oct 1, 2022 to Dec 14, 2022 |
| Consumer Confidence Rule | Resolved | Jul 1, 2022 to Aug 16, 2023 |
| Revised Total Coliform Rule | Resolved | Jul 1, 2022 to Jul 31, 2022 |
| Surface Water Treatment Rule | Resolved | Feb 1, 2022 to Feb 28, 2022 |
| Surface Water Treatment Rule | Resolved | Jan 1, 2022 to Jan 31, 2022 |
| Surface Water Treatment Rule | Resolved | Nov 1, 2021 to Nov 30, 2021 |
| Revised Total Coliform Rule | Resolved | Nov 1, 2021 to Nov 30, 2021 |
| Chlorine | Resolved | Oct 1, 2021 to Dec 31, 2021 |
| Revised Total Coliform Rule | Resolved | Jul 1, 2021 to Jul 31, 2021 |
| Surface Water Treatment Rule | Resolved | Jan 1, 2021 to Jan 31, 2021 |
| Surface Water Treatment RuleHealth-based | Addressed | Sep 30, 2008 |
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 →Frequently asked
Water questions for Adak
Is tap water safe in Adak?+
EPA ECHO reports 1 active health-based violation 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.