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HILLSIDE PARK ADDITION

PWS ID: WA5333260 · Yakima, Washington 98908

HILLSIDE PARK ADDITION serves 45 people in Yakima, Washington using Groundwater water sources. It has 93 recorded EPA violations, including 5 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: HILLSIDE PARK ADDITION

HILLSIDE PARK ADDITION is a private-owned community water system that delivers drinking water to 45 residents in Yakima, Washington (Yakima County) through 14 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 93 total violations for this system , of which 5 (5%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 86 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 Coliform (TCR), recorded in 4 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. HILLSIDE PARK ADDITION's 93 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
45
Total Violations
93
Health-Based Violations
5
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
14
County
Yakima
School/Daycare
No
MCL Violations
5
Monitoring Violations
86
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 4 2005
cis-1,2-Dichloroethylene MR 3 2007
o-Dichlorobenzene MR 3 2007
p-Dichlorobenzene MR 3 2007
Vinyl chloride MR 3 2007
1,1,1-Trichloroethane MR 3 2007
Carbon tetrachloride MR 3 2007
1,2-Dichloropropane MR 3 2007
Trichloroethylene MR 3 2007
CHLOROBENZENE MR 3 2007
Benzene MR 3 2007
Toluene MR 3 2007
Ethylbenzene MR 3 2007
Styrene MR 3 2007
1,1,2-Trichloroethane MR 3 2007
Tetrachloroethylene MR 3 2007
DICHLOROMETHANE MR 3 2007
1,2,4-Trichlorobenzene MR 3 2007
trans-1,2-Dichloroethylene MR 3 2007
1,1-Dichloroethylene MR 3 2007
1,2-Dichloroethane MR 3 2007
Barium MR 2 2014
Fluoride MR 2 2014
Selenium MR 2 2014
Coliform (TCR) MR 2 2000
Arsenic MR 2 2014
Mercury MR 2 2014
Chromium MR 2 2014
Cadmium MR 2 2014
Nickel MR 1 2014

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 HILLSIDE PARK ADDITION.

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 WA5333260 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 HILLSIDE PARK ADDITION 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
2024 Revised Total Coliform Rule MCL 1 SDWIS / WA5333260 / 8000
2016 Consumer Confidence Rule Other 1 SDWIS / WA5333260 / 7000
2014 Barium MR 2 SDWIS / WA5333260 / 1010
2014 Fluoride MR 2 SDWIS / WA5333260 / 1025
2014 Selenium MR 2 SDWIS / WA5333260 / 1045
2014 Arsenic MR 2 SDWIS / WA5333260 / 1005
2014 Mercury MR 2 SDWIS / WA5333260 / 1035
2014 Chromium MR 2 SDWIS / WA5333260 / 1020
2014 Cadmium MR 2 SDWIS / WA5333260 / 1015
2014 Nickel MR 1 SDWIS / WA5333260 / 1036
2014 Nitrite MR 1 SDWIS / WA5333260 / 1041
2014 Antimony, Total MR 1 SDWIS / WA5333260 / 1074
2014 Beryllium, Total MR 1 SDWIS / WA5333260 / 1075
2014 Thallium, Total MR 1 SDWIS / WA5333260 / 1085
2014 CYANIDE MR 1 SDWIS / WA5333260 / 1024

How HILLSIDE PARK ADDITION Compares

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

Metric HILLSIDE PARK ADDITION Washington avg Federal benchmark
Total violations 93 69 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 5 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 45 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 HILLSIDE PARK ADDITION water safe to drink? ▼
HILLSIDE PARK ADDITION (PWS ID: WA5333260) has 93 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 45 people using Groundwater sources.
How many people does HILLSIDE PARK ADDITION serve? ▼
HILLSIDE PARK ADDITION serves 45 people in Yakima, Washington. It is a Private-owned system using Groundwater water sources with 14 service connections.
What type of violations does HILLSIDE PARK ADDITION have? ▼
HILLSIDE PARK ADDITION has 93 total violations: 5 health-based violations (MCL exceedances or treatment failures), 86 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in HILLSIDE PARK ADDITION water? ▼
No PFAS testing data is available for HILLSIDE PARK ADDITION under the EPA's UCMR5 monitoring program.
What water source does HILLSIDE PARK ADDITION use? ▼
HILLSIDE PARK ADDITION 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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