Hardness
Unavailable
No qualifying site within 75 miles
Local water dashboard
Official source aggregationWater quality in Kotlik, AK 99620
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Kusilvak Census Area.
1 reported benchmark flag
- Primary matched system
- Kotlik Water System
- Source water
- Surface water
- County
- Kusilvak Census Area
- Profile updated
At a glance
What the current records say
EPA quarter 2026Q2
Compliance screen
No active flag
0 active health-based records
Lead 90th percentile
0.002 mg/L
13% of action level
Utility match
1 system
Serves 617 people system-wide
Hardness estimate unavailable
No responsible local estimate yet
We did not find enough qualifying recent USGS hardness observations within 75 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.
EPA benchmark screen
Contaminant snapshot
Available numerical results from associated SDWIS community water systems, compared with the applicable action level or federal MCL. Federal measured-value coverage is incomplete.
1 pass1 fail
Lead (PB90)
0.002 mg/L
Reported Jun 30, 2025
Copper (CU90)
1.83 mg/L
Reported Jun 30, 2011
Numerical coverage
2 comparable results
Missing values remain blank; absence is not treated as a pass.
Lead (90th percentile)
Measured in mg/L
Local 0.002
EPA limit 0.015
Copper (90th percentile)
Measured in mg/L
Local 1.83
EPA limit 1.3
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 113
- Health-based
- 9
- Active health-based
- 0
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Surface Water Treatment Rule | AK2272004 | Archived | Jan 1, 2026through Jan 31, 2026 |
| Interim Enhanced Surface Water Treatment Rule | AK2272004 | Archived | Jan 1, 2026through Jan 31, 2026 |
| Lead and Copper Rule | AK2272004 | Unaddressed | Jan 1, 2026 |
| Interim Enhanced Surface Water Treatment Rule | AK2272004 | Archived | Dec 1, 2025through Dec 31, 2025 |
| Surface Water Treatment Rule | AK2272004 | Archived | Dec 1, 2025through Dec 31, 2025 |
| CARBON, TOTAL | AK2272004 | Resolved | Nov 1, 2025through Nov 30, 2025 |
| Interim Enhanced Surface Water Treatment Rule | AK2272004 | Archived | Nov 1, 2025through Nov 30, 2025 |
| Surface Water Treatment Rule | AK2272004 | Archived | Nov 1, 2025through Nov 30, 2025 |
| CARBON, TOTAL | AK2272004 | Resolved | Nov 1, 2025through Nov 30, 2025 |
| Interim Enhanced Surface Water Treatment Rule | AK2272004 | Archived | Oct 1, 2025through Oct 31, 2025 |
| Surface Water Treatment Rule | AK2272004 | Archived | Oct 1, 2025through Oct 31, 2025 |
| Surface Water Treatment Rule | AK2272004 | Archived | Sep 1, 2025through Sep 30, 2025 |
| Interim Enhanced Surface Water Treatment Rule | AK2272004 | Archived | Sep 1, 2025through Sep 30, 2025 |
| Interim Enhanced Surface Water Treatment Rule | AK2272004 | Archived | Aug 1, 2025through Aug 31, 2025 |
| Surface Water Treatment Rule | AK2272004 | Archived | Aug 1, 2025through Aug 31, 2025 |
| Public Notice | AK2272004 | Resolved | Jun 15, 2025through Aug 7, 2025 |
| Public Notice | AK2272004 | Resolved | Jun 15, 2025through Aug 7, 2025 |
| Lead and Copper Rule | AK2272004 | Unaddressed | May 29, 2025 |
| Surface Water Treatment Rule | AK2272004 | Resolved | Apr 1, 2025through Apr 30, 2025 |
| Interim Enhanced Surface Water Treatment Rule | AK2272004 | Resolved | Apr 1, 2025through Apr 30, 2025 |
No reported violation does not prove that every contaminant was tested or absent; SDWIS measured values are incomplete and lag state records.
Solutions matcher
Your personalized water action plan
Matched to Kotlik ZIP 99620 using available compliance data and 2 reported measurement benchmarks.
Drinking water protection
Under-Sink Reverse Osmosis System
Copper (90th percentile) has a measured benchmark flag or active health-based SDWIS record in this profile.
A certified multi-stage RO system targets a broader range of dissolved contaminants at the kitchen tap.
Explore under-sink filtrationAffiliate disclosure: we may earn a commission from qualifying purchases, at no added cost to you. Product matching is educational and does not replace certified water testing.
Frequently asked
Water questions for Kotlik
Is tap water safe in Kotlik?+
EPA ECHO shows no active health-based violation for the associated systems in this reporting snapshot. This does not prove every contaminant is absent; federal records can lag and household plumbing can change tap conditions.
How hard is the water?+
There are not enough qualifying nearby USGS observations for a responsible hardness estimate. Ask the serving utility or test the household tap.
Do I need a water softener?+
There is no high-hardness trigger in this profile. Confirm with a tap test before buying equipment.