Water Quality Report

Silverlake, WA (98645): 3 Violations Recorded for Mapped Water Systems

EPA data for Castle Rock Municipal Water

EPA records for the water systems mapped to 98645 in Silverlake, WA contain 3 recorded violations for inclusive record years 2021 through 2026, all mapped systems combined; 0 are marked health-based.

Data source: U.S. Environmental Protection Agency (EPA) SDWIS

Based on EPA Drinking Water FEMA Flood Data U.S. Census CDC Energy Information Admin. USGS Water Data & 9 more federal sources

Latest air quality, EPA records and weather alerts Current data temporarily unavailable

Current EPA violation data unavailable

Safety Score N/A

Water Quality Concerns 3 non-health-based violation records in EPA data

Lead Risk Moderate 0.005 mg/L, 90th percentile, sample period ending 2024-12-31

NFIP Claim History N/A

Data confidence: High (direct measurement) Medium (sampled / sub-geography) Low (modeled / inferred) Methodology →

At a Glance

Water EPA records for water systems mapped to this ZIP show 3 violations (non-health) (since 2021).
Lead The reported 90th-percentile lead result of 0.005 mg/L is below the EPA action level, but EPA's health goal for lead is zero; filtration is advisable.
Radon EPA Zone 3 - county-level radon potential, not evidence of a low home result.

Contaminant Summary

Violations on record (not health-based)

3 violations

Report data assembled: Jul 27, 2026 EPA water-system identity: source date or period is not present in ZipCheckup's accepted source record EPA violation history: more than two update cycles old Lead, copper and UCMR measurements: source date or period is not present in ZipCheckup's accepted source record

Water System

4,367

People Served

Health Violations (since 2021)

Surface water

Water Source

0.005 mg/L

Reported Lead Result2.2× the national median for this measure

Zone 3

County Radon Potential · Low

$467K

Median Home Value11% above state median ($421K)

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Score Breakdown

Overall Home Safety Score: Score unavailable

Required evidence is missing. Missing values remain unknown and are not imputed or renormalized.

Canonical components

EPA water compliance

94/100

Observed

PFAS MCL screen

Unknown

Evidence missing

EPA radon zone

100/100

Observed

Annual EPA AirData AQI

100/100

Observed

Required domains

Drinking water

Unknown

Indoor environment

100/100

Outdoor environment

100/100

Coverage: 3 of 4 components and 2 of 3 domains observed.

Model 4.0.0; series home-safety-v4-cross-vertical.

Safety & Health (6) MODERATE

Your Water System

ZIP code 98645 in Silverlake, Washington is mapped to the water system Castle Rock Municipal Water (EPA ID: WA5311800). This system provides water to approximately 4,367 people from surface water sources.

Other Water Quality Reports in Washington

98001 (Auburn) - 6 violations recorded for mapped water systems
98002 (Auburn) - 2 violations recorded for mapped water systems
98003 (Federal Way) - 1 violation recorded for mapped water systems
98004 (Bellevue) - 3 violations recorded for mapped water systems
98005 (Bellevue)
98006 (Bellevue) - 5 violations recorded for mapped water systems
98007 (Bellevue)
98008 (Bellevue)
98009 (Bellevue)
98010 (Black Diamond)
98011 (Bothell) - 1 violation recorded for mapped water systems
98012 (Bothell) - 2 violations recorded for mapped water systems
98013 (Burton)
98014 (Carnation) - 3 violations recorded for mapped water systems
98015 (Bellevue)
98019 (Duvall) - 45 violations recorded for mapped water systems
98020 (Edmonds) - 3 violations recorded for mapped water systems
98021 (Bothell) - 5 violations recorded for mapped water systems
98022 (Enumclaw) - 2 violations recorded for mapped water systems
98023 (Federal Way) - 1 violation recorded for mapped water systems

Nearby Water Quality Reports

98649 (Toutle) - 6 mi
98611 (Castle Rock) - 8 mi - 7 violations recorded for mapped water systems
98591 (Toledo) - 9 mi - 1 violation recorded for mapped water systems
98593 (Vader) - 11 mi
98626 (Kelso) - 13 mi - 7 violations recorded for mapped water systems
98581 (Ryderwood) - 14 mi
98596 (Winlock) - 14 mi - 17 violations recorded for mapped water systems
98632 (Longview) - 15 mi - 4 violations recorded for mapped water systems
98542 (Ethel) - 15 mi
98582 (Salkum) - 16 mi

Data Sources

This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Castle Rock Municipal Water (WA5311800) on EPA.gov.

4 of the top compounds applied across the surrounding county in USGS pesticide-use estimates appear on EPA drinking-water monitoring lists. See the agricultural pesticide-use section.

📊 EPA Safe Drinking Water · View source →

Environmental Hazards (10) HIGH

Home & Infrastructure (7) MODERATE

Cost & Community (7) OK

CPSC product recall notices

These national notices are not matched to this ZIP code or water system.

View all recalls →

📊 CPSC · View source →

Frequently Asked Questions

Is the tap water in 98645 safe to drink?

EPA SDWIS records 3 violations since 2021 across the water systems mapped to ZIP 98645 (primary system: Castle Rock Municipal Water), including 0 health-based. The violation table above shows which system each record belongs to. ZipCheckup last updated this page in July 2026. The federal source release date is unavailable, so that month is not presented as source currency.

Where does 98645's water come from?

The recorded water source for Castle Rock Municipal Water, a system mapped to ZIP code 98645, is Surface water. This system serves approximately 4,367 people.

How can I get my water tested in Silverlake?

If Castle Rock Municipal Water supplies your home, contact it for its Consumer Confidence Report; otherwise contact the water utility that serves your address, or hire a certified lab for independent home water testing. The EPA recommends annual testing if you use a private well.

Is lead a concern in 98645 tap water?

The Lead and Copper Rule record selected for 98645 reports a 90th-percentile lead result of 0.005 mg/L for a water system mapped to this ZIP (record date 2024-12-31). The EPA action level is 0.015 mg/L. This result is below the EPA action level; it does not show the lead level in each home.

What is the radon risk for 98645?

98645 is mapped to a county in EPA Radon Zone 3 (low county-level radon potential; EPA recommends testing every home), located in Cowlitz County. EPA radon zones range from Zone 1 (highest county-level potential) to Zone 3 (lowest). Testing your home is recommended regardless of zone.

How to cite this page

APA

ZipCheckup. (2026). Silverlake, WA (98645): 3 Violations Recorded for Mapped Water Systems. https://zipcheckup.com/report/98645/

BibTeX

@misc{zipcheckup-report-98645,
  author = {{ZipCheckup}},
  title  = {{Silverlake, WA (98645): 3 Violations Recorded for Mapped Water Systems}},
  year   = {2026},
  url    = {https://zipcheckup.com/report/98645/}
}

Page version: October 2026.

Nearby ZIP Code Reports

Water quality comparison for ZIP codes near 98645

ZIP Code	City, State	Distance	Grade	Violations
98649	Toutle, WA	5.8 mi	N/A	0
98611	Castle Rock, WA	7.6 mi	A	7
98591	Toledo, WA	9.0 mi	N/A	1
98593	Vader, WA	10.8 mi	N/A	0
98626	Kelso, WA	13.0 mi	A	7
98581	Ryderwood, WA	13.9 mi	N/A	0
98596	Winlock, WA	14.2 mi	N/A	17
98632	Longview, WA	14.8 mi	A	4
98542	Ethel, WA	15.0 mi	N/A	0
98582	Salkum, WA	16.3 mi	N/A	0