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CASCADE MHP

PWS ID: WA5367310 · Morton, Washington 98356

CASCADE MHP serves 48 people in Morton, Washington using Groundwater water sources. It has 957 recorded EPA violations, including 6 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: CASCADE MHP

CASCADE MHP is a private-owned community water system that delivers drinking water to 48 residents in Morton, Washington (Lewis County) through 17 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 957 total violations for this system , of which 6 (1%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 947 monitoring and reporting violations are on file. The most recent violation on record dates to 2022.

The most frequently cited contaminant at this system is DICHLOROMETHANE, recorded in 38 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. CASCADE MHP's 957 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
957
Health-Based Violations
6
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
17
County
Lewis
School/Daycare
No
MCL Violations
6
Monitoring Violations
947
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
DICHLOROMETHANE MR 38 2007
o-Dichlorobenzene MR 38 2007
p-Dichlorobenzene MR 38 2007
Vinyl chloride MR 38 2007
1,2-Dichloroethane MR 38 2007
1,1,1-Trichloroethane MR 38 2007
1,2-Dichloropropane MR 38 2007
Trichloroethylene MR 38 2007
1,1,2-Trichloroethane MR 38 2007
Tetrachloroethylene MR 38 2007
CHLOROBENZENE MR 38 2007
1,1-Dichloroethylene MR 38 2007
trans-1,2-Dichloroethylene MR 38 2007
Carbon tetrachloride MR 38 2007
Benzene MR 38 2007
Toluene MR 38 2007
Styrene MR 38 2007
1,2,4-Trichlorobenzene MR 38 2007
cis-1,2-Dichloroethylene MR 38 2007
Ethylbenzene MR 38 2007
Lead and Copper Rule MR 13 2022
Pentachlorophenol MR 12 2006
Coliform (TCR) MR 9 2003
Coliform (TCR) MCL 6 1998
LASSO MR 6 2006
Simazine MR 6 2006
Benzo(a)pyrene MR 6 2006
Hexachlorocyclopentadiene MR 6 2006
Heptachlor MR 6 2006
Aldicarb sulfoxide MR 6 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 CASCADE MHP.

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 WA5367310 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 CASCADE MHP 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
2022 Lead and Copper Rule MR 13 SDWIS / WA5367310 / 5000
2007 DICHLOROMETHANE MR 38 SDWIS / WA5367310 / 2964
2007 o-Dichlorobenzene MR 38 SDWIS / WA5367310 / 2968
2007 p-Dichlorobenzene MR 38 SDWIS / WA5367310 / 2969
2007 Vinyl chloride MR 38 SDWIS / WA5367310 / 2976
2007 1,2-Dichloroethane MR 38 SDWIS / WA5367310 / 2980
2007 1,1,1-Trichloroethane MR 38 SDWIS / WA5367310 / 2981
2007 1,2-Dichloropropane MR 38 SDWIS / WA5367310 / 2983
2007 Trichloroethylene MR 38 SDWIS / WA5367310 / 2984
2007 1,1,2-Trichloroethane MR 38 SDWIS / WA5367310 / 2985
2007 Tetrachloroethylene MR 38 SDWIS / WA5367310 / 2987
2007 CHLOROBENZENE MR 38 SDWIS / WA5367310 / 2989
2007 1,1-Dichloroethylene MR 38 SDWIS / WA5367310 / 2977
2007 trans-1,2-Dichloroethylene MR 38 SDWIS / WA5367310 / 2979
2007 Carbon tetrachloride MR 38 SDWIS / WA5367310 / 2982

How CASCADE MHP Compares

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

Metric CASCADE MHP Washington avg Federal benchmark
Total violations 957 69 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 6 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 CASCADE MHP water safe to drink? ▼
CASCADE MHP (PWS ID: WA5367310) has 957 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 CASCADE MHP serve? ▼
CASCADE MHP serves 48 people in Morton, Washington. It is a Private-owned system using Groundwater water sources with 17 service connections.
What type of violations does CASCADE MHP have? ▼
CASCADE MHP has 957 total violations: 6 health-based violations (MCL exceedances or treatment failures), 947 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in CASCADE MHP water? ▼
No PFAS testing data is available for CASCADE MHP under the EPA's UCMR5 monitoring program.
What water source does CASCADE MHP use? ▼
CASCADE MHP 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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