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City water profile

Water hardness in Coffman Cove

Find official utility reports, understand hardness, and check the water system serving your home in Coffman Cove, Alaska.

Utility-reported hardness

Not yet available

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State comparison
Unavailable
Evidence comparison rank
—
Matched utilities
1
Active health records
0

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.

Coffman Cove

AK2120436 · Surface water · 199 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 (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

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

Total Haloacetic Acids (HAA5)

EPA SDWIS reported health-based violation

Reported violation
Reported level
0.078 MG/L
Maximum contaminant level
0.06 MG/L

130% of the listed benchmark

Monitoring period: Apr 1, 2025 to Jun 30, 2025

Violation history (23)
Imported violation history for Coffman Cove
RuleStatusPeriod
Public NoticeResolvedSep 8, 2025 to Oct 30, 2025
Total Haloacetic Acids (HAA5)Health-basedResolvedApr 1, 2025 to Jun 30, 2025
Total Haloacetic Acids (HAA5)Health-basedResolvedJan 1, 2025 to Mar 31, 2025
Interim Enhanced Surface Water Treatment RuleResolvedDec 1, 2024 to Dec 31, 2024
Surface Water Treatment RuleResolvedDec 1, 2024 to Dec 31, 2024
Total Haloacetic Acids (HAA5)Health-basedResolvedOct 1, 2024 to Dec 31, 2024
Consumer Confidence RuleResolvedJul 1, 2024 to Sep 10, 2024
ChlorineResolvedJun 1, 2024 to Jun 30, 2024
Surface Water Treatment RuleResolvedJun 1, 2024 to Jun 30, 2024
Revised Total Coliform RuleResolvedJun 1, 2024 to Jun 30, 2024
CARBON, TOTALHealth-basedResolvedApr 1, 2022 to Jun 30, 2022
CARBON, TOTALResolvedJan 1, 2022 to Mar 1, 2022
CARBON, TOTALHealth-basedResolvedJan 1, 2022 to Mar 31, 2022
Revised Total Coliform RuleResolvedJan 1, 2022 to Jan 31, 2022
Revised Total Coliform RuleResolvedDec 1, 2021 to Dec 31, 2021
CARBON, TOTALHealth-basedResolvedOct 1, 2021 to Dec 31, 2021
ChlorineResolvedOct 1, 2021 to Dec 31, 2021
Revised Total Coliform RuleResolvedAug 1, 2021 to Aug 31, 2021
Consumer Confidence RuleResolvedJul 1, 2021 to Sep 17, 2021
CARBON, TOTALHealth-basedResolvedJul 1, 2021 to Sep 30, 2021
ChlorineResolvedJul 1, 2021 to Sep 30, 2021
CARBON, TOTALHealth-basedResolvedApr 1, 2021 to Jun 30, 2021
CARBON, TOTALHealth-basedResolvedJan 1, 2021 to Mar 31, 2021

City summary

What the indexed records say

Coffman Cove has 1 published ZIP profile across Prince Of Wales-Hyder Census Area. No qualifying nearby hardness observation is available for the city.

Because only one ZIP is represented, the city median and range are the same local estimate. It should not be read as multiple independent samples across the community.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs
Moderately hard0 ZIPs
Hard0 ZIPs
Very hard0 ZIPs

0 of 1 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
0/1

Confidence labels

High: 0Moderate: 0Low: 0

Observation window: unavailable to unavailable.

ZIP directory

Water reports in Coffman Cove

Open a ZIP for site-level provenance and measurements.

ZIP code

99918

No estimate

—

Nearest site
— mi
Confidence
—

View full ZIP evidence →

Practical next steps

Move from index to evidence

  1. 1. Open your ZIP. Check distance, dates, confidence, and the associated utility.
  2. 2. Read the current CCR. Confirm source water, detections, limits, ranges, and notices.
  3. 3. Use a measured hardness result. Confirm health concerns or treatment sizing with the right method.

Questions people ask

About water in Coffman Cove

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.