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GEMSTONE ESTATES

PWS ID: AK2220146 · BIG LAKE, Alaska 99652

GEMSTONE ESTATES serves 75 people in BIG LAKE, Alaska using Groundwater water sources. It has 290 recorded EPA violations, including 3 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: GEMSTONE ESTATES

GEMSTONE ESTATES is a private-owned community water system that delivers drinking water to 75 residents in BIG LAKE, Alaska (Matanuska-Susitna Borough County) through 64 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 290 total violations for this system , of which 3 (1%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 259 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Vinyl chloride, recorded in 13 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across Alaska, EPA tracks 1,326 public water systems serving 862,218 people, with 267,144 cumulative violations and 13,963 health-based violations on record. About 98% of systems in the state carry at least one violation, and state-wide the average per system is 201.5 violations. GEMSTONE ESTATES's 290 violations sit above the Alaska average. Statewide, 10 of 30 UCMR5-tested systems have reported PFAS detections (33.3%). All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
75
Total Violations
290
Health-Based Violations
3
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
64
County
Matanuska-Susitna Borough
School/Daycare
No
MCL Violations
3
Monitoring Violations
259
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Vinyl chloride MR 13 2012
1,2,4-Trichlorobenzene MR 12 2012
Xylenes, Total MR 12 2012
DICHLOROMETHANE MR 12 2012
o-Dichlorobenzene MR 12 2012
p-Dichlorobenzene MR 12 2012
1,1-Dichloroethylene MR 12 2012
1,2-Dichloroethane MR 12 2012
1,1,1-Trichloroethane MR 12 2012
1,1,2-Trichloroethane MR 12 2012
CHLOROBENZENE MR 12 2012
Toluene MR 12 2012
trans-1,2-Dichloroethylene MR 12 2012
Trichloroethylene MR 12 2012
Benzene MR 12 2012
Styrene MR 12 2012
Ethylbenzene MR 12 2012
1,2-Dichloropropane MR 12 2012
Tetrachloroethylene MR 12 2012
cis-1,2-Dichloroethylene MR 12 2012
Carbon tetrachloride MR 12 2012
Coliform (TCR) MCL 3 2015
Lead and Copper Rule MR 3 2012
Consumer Confidence Rule Other 2 2020
Arsenic MR 2 2011
Public Notice Other 1 2024
Fluoride MR 1 2020

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records — or to file a complaint, request a Consumer Confidence Report, or check current monitoring status — go directly to the federal and state regulators that enforce the Safe Drinking Water Act for GEMSTONE ESTATES.

Federal Source of Truth

EPA SDWIS — Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID AK2220146 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Alaska Drinking Water Authority

Alaska's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find AK regulator via EPA SDWIS

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2024 Public Notice Other 1 SDWIS / AK2220146 / 7500
2020 Consumer Confidence Rule Other 2 SDWIS / AK2220146 / 7000
2020 Fluoride MR 1 SDWIS / AK2220146 / 1025
2015 Coliform (TCR) MCL 3 SDWIS / AK2220146 / 3100
2012 Vinyl chloride MR 13 SDWIS / AK2220146 / 2976
2012 1,2,4-Trichlorobenzene MR 12 SDWIS / AK2220146 / 2378
2012 Xylenes, Total MR 12 SDWIS / AK2220146 / 2955
2012 DICHLOROMETHANE MR 12 SDWIS / AK2220146 / 2964
2012 o-Dichlorobenzene MR 12 SDWIS / AK2220146 / 2968
2012 p-Dichlorobenzene MR 12 SDWIS / AK2220146 / 2969
2012 1,1-Dichloroethylene MR 12 SDWIS / AK2220146 / 2977
2012 1,2-Dichloroethane MR 12 SDWIS / AK2220146 / 2980
2012 1,1,1-Trichloroethane MR 12 SDWIS / AK2220146 / 2981
2012 1,1,2-Trichloroethane MR 12 SDWIS / AK2220146 / 2985
2012 CHLOROBENZENE MR 12 SDWIS / AK2220146 / 2989

How GEMSTONE ESTATES Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric GEMSTONE ESTATES Alaska avg Federal benchmark
Total violations 290 201.5 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 3 10.5 Indicates a contaminant exceeded a federal MCL
PFAS detection None 33.3% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 75 650 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 1,326 regulated public water systems in Alaska.

Federal MCL reference — Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is GEMSTONE ESTATES water safe to drink? ▼
GEMSTONE ESTATES (PWS ID: AK2220146) has 290 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 75 people using Groundwater sources.
How many people does GEMSTONE ESTATES serve? ▼
GEMSTONE ESTATES serves 75 people in BIG LAKE, Alaska. It is a Private-owned system using Groundwater water sources with 64 service connections.
What type of violations does GEMSTONE ESTATES have? ▼
GEMSTONE ESTATES has 290 total violations: 3 health-based violations (MCL exceedances or treatment failures), 259 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in GEMSTONE ESTATES water? ▼
No PFAS testing data is available for GEMSTONE ESTATES under the EPA's UCMR5 monitoring program.
What water source does GEMSTONE ESTATES use? ▼
GEMSTONE ESTATES uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.

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Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology — how this data is sourced, computed, and verified.

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