Cascade Valley, WA Tap Water Quality 2026

Water quality report for Cascade Valley, WA — PFAS, lead and copper results, violation history and state inspection findings from EPA SDWIS.

A look at Cascade Valley's drinking water using EPA enforcement records: violations, lead and copper results, PFAS sampling and state inspection findings.

Main Utility: Moses Lake City Of PWSID: WA5356300 Updated: 2026 Q2

⚠️

PFAS above the federal limit at 1 of 18 sampling points

Lead is 3.20 ppb, 21% of the action level and no violations are open. However, PFAS exceeds the federal limit at 1 of 18 sampling points, running as high as 7.85 times the limit.

Cascade Valley earns a C for water quality

Graded on violations, lead, and PFAS, with state inspection findings.

Lead: 3.20 ppb — 21% of the federal action level

PFAS above the federal limit at 1 of 18 sampling points

67 violations since 2015, 0 health-based

No violations currently open

Cascade Valley's lead level vs. all Washington community water systems

0 ppb5 ppb10 ppb15 ppb

Lead level: 3.20 ppb — 21% of the federal action level

✓ Lower lead than 29% of Washington utilities

Population Served

2169

~13420 connections

Water Source

Groundwater

Drawn from wells — SDWIS source code GW

Active Violations

67 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)

90th percentile of tap samples collected across the distribution system

21% of EPA action level

3.20 ppb

Action level: 15 ppb

The 90th-percentile lead result is 3.20 ppb, 21% of the 15 ppb federal action level. The action level is a treatment trigger, not a legal maximum, and it is measured across sampled taps rather than at any single home.

Contaminant Violations (2015–Present)

Contaminant	Type	Measured	Limit	Period	Status
1,2,4-Trichlorobenzene	MONITORING AND REPORTING	—	0.07 mg/L	2022	Resolved
cis-1,2-Dichloroethylene	MONITORING AND REPORTING	—	0.07 mg/L	2022	Resolved
DICHLOROMETHANE	MONITORING AND REPORTING	—	0.005 mg/L	2022	Resolved
o-Dichlorobenzene	MONITORING AND REPORTING	—	0.6 mg/L	2022	Resolved
p-Dichlorobenzene	MONITORING AND REPORTING	—	0.075 mg/L	2022	Resolved
Vinyl chloride	MONITORING AND REPORTING	—	0.002 mg/L	2022	Resolved
1,1-Dichloroethylene	MONITORING AND REPORTING	—	0.007 mg/L	2022	Resolved
trans-1,2-Dichloroethylene	MONITORING AND REPORTING	—	0.1 mg/L	2022	Resolved
1,2-Dichloroethane	MONITORING AND REPORTING	—	0.005 mg/L	2022	Resolved
1,1,1-Trichloroethane	MONITORING AND REPORTING	—	0.2 mg/L	2022	Resolved
Carbon tetrachloride	MONITORING AND REPORTING	—	0.005 mg/L	2022	Resolved
1,2-Dichloropropane	MONITORING AND REPORTING	—	0.005 mg/L	2022	Resolved
Trichloroethylene	MONITORING AND REPORTING	—	0.005 mg/L	2022	Resolved
1,1,2-Trichloroethane	MONITORING AND REPORTING	—	0.005 mg/L	2022	Resolved
Tetrachloroethylene	MONITORING AND REPORTING	—	0.005 mg/L	2022	Resolved
CHLOROBENZENE	MONITORING AND REPORTING	—	0.1 mg/L	2022	Resolved
Benzene	MONITORING AND REPORTING	—	0.005 mg/L	2022	Resolved
Toluene	MONITORING AND REPORTING	—	1 mg/L	2022	Resolved
Ethylbenzene	MONITORING AND REPORTING	—	0.7 mg/L	2022	Resolved
Styrene	MONITORING AND REPORTING	—	0.1 mg/L	2022	Resolved
1,2,4-Trichlorobenzene	MONITORING AND REPORTING	—	0.07 mg/L	2022	Resolved
cis-1,2-Dichloroethylene	MONITORING AND REPORTING	—	0.07 mg/L	2022	Resolved
DICHLOROMETHANE	MONITORING AND REPORTING	—	0.005 mg/L	2022	Resolved
o-Dichlorobenzene	MONITORING AND REPORTING	—	0.6 mg/L	2022	Resolved
p-Dichlorobenzene	MONITORING AND REPORTING	—	0.075 mg/L	2022	Resolved
Vinyl chloride	MONITORING AND REPORTING	—	0.002 mg/L	2022	Resolved
1,1-Dichloroethylene	MONITORING AND REPORTING	—	0.007 mg/L	2022	Resolved
trans-1,2-Dichloroethylene	MONITORING AND REPORTING	—	0.1 mg/L	2022	Resolved
1,2-Dichloroethane	MONITORING AND REPORTING	—	0.005 mg/L	2022	Resolved
1,1,1-Trichloroethane	MONITORING AND REPORTING	—	0.2 mg/L	2022	Resolved
Carbon tetrachloride	MONITORING AND REPORTING	—	0.005 mg/L	2022	Resolved
1,2-Dichloropropane	MONITORING AND REPORTING	—	0.005 mg/L	2022	Resolved
Trichloroethylene	MONITORING AND REPORTING	—	0.005 mg/L	2022	Resolved
1,1,2-Trichloroethane	MONITORING AND REPORTING	—	0.005 mg/L	2022	Resolved
Tetrachloroethylene	MONITORING AND REPORTING	—	0.005 mg/L	2022	Resolved
CHLOROBENZENE	MONITORING AND REPORTING	—	0.1 mg/L	2022	Resolved
Benzene	MONITORING AND REPORTING	—	0.005 mg/L	2022	Resolved
Toluene	MONITORING AND REPORTING	—	1 mg/L	2022	Resolved
Ethylbenzene	MONITORING AND REPORTING	—	0.7 mg/L	2022	Resolved
Styrene	MONITORING AND REPORTING	—	0.1 mg/L	2022	Resolved
Revised Total Coliform Rule	MONITORING FAILURE	—	—	2022	Resolved
Fluoride	MONITORING AND REPORTING	—	4.0 mg/L	2022	Resolved
1,2,4-Trichlorobenzene	MONITORING AND REPORTING	—	0.07 mg/L	2019	Resolved
cis-1,2-Dichloroethylene	MONITORING AND REPORTING	—	0.07 mg/L	2019	Resolved
DICHLOROMETHANE	MONITORING AND REPORTING	—	0.005 mg/L	2019	Resolved
o-Dichlorobenzene	MONITORING AND REPORTING	—	0.6 mg/L	2019	Resolved
p-Dichlorobenzene	MONITORING AND REPORTING	—	0.075 mg/L	2019	Resolved
Vinyl chloride	MONITORING AND REPORTING	—	0.002 mg/L	2019	Resolved
1,1-Dichloroethylene	MONITORING AND REPORTING	—	0.007 mg/L	2019	Resolved
trans-1,2-Dichloroethylene	MONITORING AND REPORTING	—	0.1 mg/L	2019	Resolved
1,2-Dichloroethane	MONITORING AND REPORTING	—	0.005 mg/L	2019	Resolved
1,1,1-Trichloroethane	MONITORING AND REPORTING	—	0.2 mg/L	2019	Resolved
Carbon tetrachloride	MONITORING AND REPORTING	—	0.005 mg/L	2019	Resolved
1,2-Dichloropropane	MONITORING AND REPORTING	—	0.005 mg/L	2019	Resolved
Trichloroethylene	MONITORING AND REPORTING	—	0.005 mg/L	2019	Resolved
1,1,2-Trichloroethane	MONITORING AND REPORTING	—	0.005 mg/L	2019	Resolved
Tetrachloroethylene	MONITORING AND REPORTING	—	0.005 mg/L	2019	Resolved
CHLOROBENZENE	MONITORING AND REPORTING	—	0.1 mg/L	2019	Resolved
Benzene	MONITORING AND REPORTING	—	0.005 mg/L	2019	Resolved
Toluene	MONITORING AND REPORTING	—	1 mg/L	2019	Resolved
Ethylbenzene	MONITORING AND REPORTING	—	0.7 mg/L	2019	Resolved
Styrene	MONITORING AND REPORTING	—	0.1 mg/L	2019	Resolved
Revised Total Coliform Rule	MONITORING FAILURE	—	—	2018	Resolved
Consumer Confidence Rule	OTHER	—	—	2018	Resolved
Consumer Confidence Rule	OTHER	—	—	2017	Resolved
Consumer Confidence Rule	OTHER	—	—	2016	Resolved
Consumer Confidence Rule	OTHER	—	—	2015	Resolved

Understanding violation types MCL violations mean a contaminant exceeded the federal maximum limit — the most serious type.
TT (Treatment Technique) violations mean required treatment procedures weren't followed, but don't necessarily mean contamination occurred.

Violation History

67 violations are on record since 2015, of which 0 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Moses Lake City Of

PWSID WA5356300

Water source Groundwater — Drawn from wells — SDWIS source code GW

Population served 2,169

Service connections 13,420

Systems serving this area 10

Regulator State primacy agency

Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Cascade Valley tap water safe to drink? ▼

It meets most federal standards, but PFAS exceeds the federal limit at 1 of 18 sampling points. No violations are currently open. Lead is 3.20 ppb, 21% of the action level.

Does Cascade Valley water have PFAS? ▼

Yes. PFAS exceeds the federal limit at 1 of 18 sampling points, running as high as 7.85 times the limit. Limits are enforced on a running annual average at each sampling point, not on a single sample.

Who supplies water to Cascade Valley? ▼

Moses Lake City Of (PWSID WA5356300), one of 10 systems serving this area. Groundwater. Drawn from wells — SDWIS source code GW

When was this system last inspected? ▼

It was last inspected on 2024-06-06. No significant deficiencies were recorded.

What Should Cascade Valley Residents Do?

Consider a reverse-osmosis filter

Reverse osmosis removes more than 95% of PFAS. Standard carbon pitchers do not.

Check for a lead service line

Lead reaches tap water mainly through service lines and household plumbing. Suppliers now publish an inventory identifying lead lines.

Flush before drinking

If water has sat in pipes more than six hours, run the cold tap for two minutes before drinking or cooking.

Nearby Cities in Washington

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