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CORNERSTONE ESTATES 606

PWS ID: WA5300133 · Lacey, Washington 98503

CORNERSTONE ESTATES 606 serves 48 people in Lacey, Washington using Groundwater water sources. It has 515 recorded EPA violations, including 1 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: CORNERSTONE ESTATES 606

CORNERSTONE ESTATES 606 is a local-owned community water system that delivers drinking water to 48 residents in Lacey, Washington (Thurston County) through 15 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 515 total violations for this system , of which 1 (0%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 513 monitoring and reporting violations are on file. The most recent violation on record dates to 2010.

The most frequently cited contaminant at this system is 1,2,4-Trichlorobenzene, recorded in 25 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 Washington, EPA tracks 4,557 public water systems serving 9,736,844 people, with 314,648 cumulative violations and 20,590 health-based violations on record. About 92% of systems in the state carry at least one violation, and state-wide the average per system is 69 violations. CORNERSTONE ESTATES 606's 515 violations sit above the Washington average. Statewide, 98 of 247 UCMR5-tested systems have reported PFAS detections (39.7%). 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
48
Total Violations
515
Health-Based Violations
1
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
15
County
Thurston
School/Daycare
No
MCL Violations
1
Monitoring Violations
513
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
1,2,4-Trichlorobenzene MR 25 2005
DICHLOROMETHANE MR 25 2005
o-Dichlorobenzene MR 25 2005
Vinyl chloride MR 25 2005
trans-1,2-Dichloroethylene MR 25 2005
1,1,1-Trichloroethane MR 25 2005
Carbon tetrachloride MR 25 2005
1,2-Dichloropropane MR 25 2005
Tetrachloroethylene MR 25 2005
CHLOROBENZENE MR 25 2005
Benzene MR 25 2005
Toluene MR 25 2005
Ethylbenzene MR 25 2005
cis-1,2-Dichloroethylene MR 25 2005
p-Dichlorobenzene MR 25 2005
1,1-Dichloroethylene MR 25 2005
Trichloroethylene MR 25 2005
Styrene MR 25 2005
1,2-Dichloroethane MR 25 2005
1,1,2-Trichloroethane MR 25 2005
Coliform (TCR) MR 7 2010
Diquat MR 5 2005
Coliform (TCR) MCL 1 2006
Consumer Confidence Rule Other 1 2010
Lead and Copper Rule MR 1 2006

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 CORNERSTONE ESTATES 606.

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 WA5300133 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Washington Drinking Water Authority

Washington State Department of Health — Office of Drinking Water is the primacy agency that licenses and inspects CORNERSTONE ESTATES 606 under EPA-delegated authority.

Open WA regulator portal

Source: Washington State Department of Health — Office of Drinking Water

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
2010 Coliform (TCR) MR 7 SDWIS / WA5300133 / 3100
2010 Consumer Confidence Rule Other 1 SDWIS / WA5300133 / 7000
2006 Coliform (TCR) MCL 1 SDWIS / WA5300133 / 3100
2006 Lead and Copper Rule MR 1 SDWIS / WA5300133 / 5000
2005 1,2,4-Trichlorobenzene MR 25 SDWIS / WA5300133 / 2378
2005 DICHLOROMETHANE MR 25 SDWIS / WA5300133 / 2964
2005 o-Dichlorobenzene MR 25 SDWIS / WA5300133 / 2968
2005 Vinyl chloride MR 25 SDWIS / WA5300133 / 2976
2005 trans-1,2-Dichloroethylene MR 25 SDWIS / WA5300133 / 2979
2005 1,1,1-Trichloroethane MR 25 SDWIS / WA5300133 / 2981
2005 Carbon tetrachloride MR 25 SDWIS / WA5300133 / 2982
2005 1,2-Dichloropropane MR 25 SDWIS / WA5300133 / 2983
2005 Tetrachloroethylene MR 25 SDWIS / WA5300133 / 2987
2005 CHLOROBENZENE MR 25 SDWIS / WA5300133 / 2989
2005 Benzene MR 25 SDWIS / WA5300133 / 2990

How CORNERSTONE ESTATES 606 Compares

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

Metric CORNERSTONE ESTATES 606 Washington avg Federal benchmark
Total violations 515 69 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 1 4.5 Indicates a contaminant exceeded a federal MCL
PFAS detection None 39.7% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 48 2,137 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 4,557 regulated public water systems in Washington.

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 CORNERSTONE ESTATES 606 water safe to drink? ▼
CORNERSTONE ESTATES 606 (PWS ID: WA5300133) has 515 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 48 people using Groundwater sources.
How many people does CORNERSTONE ESTATES 606 serve? ▼
CORNERSTONE ESTATES 606 serves 48 people in Lacey, Washington. It is a Local-owned system using Groundwater water sources with 15 service connections.
What type of violations does CORNERSTONE ESTATES 606 have? ▼
CORNERSTONE ESTATES 606 has 515 total violations: 1 health-based violations (MCL exceedances or treatment failures), 513 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in CORNERSTONE ESTATES 606 water? ▼
No PFAS testing data is available for CORNERSTONE ESTATES 606 under the EPA's UCMR5 monitoring program.
What water source does CORNERSTONE ESTATES 606 use? ▼
CORNERSTONE ESTATES 606 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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