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Community Water System · PWS WA5310761

North Slope Estates Property

Pasco, Washington 99301 - drinking water served from groundwater sources to 97 people, tracked in EPA SDWIS and UCMR5.

97
People served
20
EPA violations
8
Health-based
Untested
UCMR5 result

The verdict

EPA records 20 drinking-water violations at North Slope Estates Property, 40% of them health-based - below the Washington per-system average.

20
Total EPA violations on record
40%
Health-based (MCL / treatment failure)
97
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: North Slope Estates Property

North Slope Estates Property is a private-owned community water system that delivers drinking water to 97 residents in Pasco, Washington (Franklin County) through 30 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 20 total violations for this system , of which 8 (40%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 7 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 5 violations (MCL, health-based). 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. Statewide, 98 of 247 UCMR5-tested systems have reported PFAS detections (39.7%).

North Slope Estates Property's 20 violations sit below the Washington average.

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
97
Total Violations
20
Health-Based Violations
8
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
30
County
Franklin
School/Daycare
No
MCL Violations
8
Monitoring Violations
7
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 5 1999
Arsenic MR 4 2006
Arsenic MCL 3 2025
Consumer Confidence Rule Other 3 2025
Revised Total Coliform Rule MON 1 2022
Lead and Copper Rule MR 1 1999
Coliform (TCR) MR 1 1995

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 North Slope Estates Property.

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 WA5310761 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 North Slope Estates Property 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
2025 Arsenic MCL 3 SDWIS / WA5310761 / 1005
2025 Consumer Confidence Rule Other 3 SDWIS / WA5310761 / 7000
2022 Revised Total Coliform Rule MON 1 SDWIS / WA5310761 / 8000
2006 Arsenic MR 4 SDWIS / WA5310761 / 1005
1999 Coliform (TCR) MCL 5 SDWIS / WA5310761 / 3100
1999 Lead and Copper Rule MR 1 SDWIS / WA5310761 / 5000
1995 Coliform (TCR) MR 1 SDWIS / WA5310761 / 3100

How North Slope Estates Property Compares

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

Metric North Slope Estates Property Washington avg Federal benchmark
Total violations 20 69 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 8 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 97 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 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is North Slope Estates Property water safe to drink? ▼
North Slope Estates Property (PWS ID: WA5310761) has 20 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 97 people using Groundwater sources.
How many people does North Slope Estates Property serve? ▼
North Slope Estates Property serves 97 people in Pasco, Washington. It is a Private-owned system using Groundwater water sources with 30 service connections.
What type of violations does North Slope Estates Property have? ▼
North Slope Estates Property has 20 total violations: 8 health-based violations (MCL exceedances or treatment failures), 7 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in North Slope Estates Property water? ▼
No PFAS testing data is available for North Slope Estates Property under the EPA's UCMR5 monitoring program.
What water source does North Slope Estates Property use? ▼
North Slope Estates Property 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.
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.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.