Unlike many cities its size in WA, Redmond keeps health-based violation rates low - systems here score at or above the state average for tap water safety, with no systemic concerns flagged in the current data set.

Data: EPA SDWIS

Overview

We track home safety data for 3 ZIP codes in Redmond, Washington (population ~101,912), covering 7 community water systems serving approximately 711,932 people region-wide. The EPA snapshots used for this build directly map water systems to 2 of 3 ZIP codes.

1 of 2 ZIP codes with a reported violation count in the available EPA record (50%) have recorded EPA violations. The available record reports no health-based violations for this measured scope.

Home Safety Score

Average Home Safety Score for Redmond: B (83/100)

Model 4.0.0 uses four measured components across three equally weighted domains. If a required domain is unavailable, no score is published:

Factor	What It Measures
Water Quality	EPA violations and compliance history
PFAS MCL Screen	UCMR 5 testing against the covered federal MCLs
Radon Risk	EPA radon zone classification
Annual AQI	EPA AirData county-year median with at least 90 observed days

Water Sources

Redmond water systems draw from: Groundwater, Surface water.

Lead & Copper

• Average lead level (90th percentile): 0.0058 mg/L (EPA action level: 0.015 mg/L)
• 0 of 2 ZIP codes with known status exceed the EPA lead action level

Radon Risk

Dominant radon zone: Zone 3 (Low Risk)

• Zone 1 (High): 0 ZIP codes
• Zone 2 (Moderate): 0 ZIP codes
• Zone 3 (Low): 3 ZIP codes

Top Contaminants

Areas with Most Violations

Areas with No Violations

All ZIP Codes in Redmond

• 98052 [B]
• 98053 [B] - 2 violations
• 98073

Data Sources

• Water quality: EPA Safe Drinking Water Information System (SDWIS)
• Lead/copper: EPA Lead and Copper Rule sampling data
• Radon: EPA Map of Radon Zones

Reporting periods vary by source. Missing data is shown as unavailable, not as zero.

Housing Age Profile

The story of Redmond's housing stock is one of layered development - neighborhoods built in different decades, each carrying the plumbing standards of their era. The median build year of 1994 reflects that layered character. Before 1986, lead solder was standard in copper plumbing; before 1970, lead pipes were commonly used for service lines. A substantial portion of the pre-1986 homes visible in the distribution above still carry the plumbing materials of those earlier standards - creating a risk environment that the city-wide aggregate water data doesn't fully capture.

1994

Median Year Built

33%

Pre-1986 (Lead Paint Risk)

3%

Pre-1970 (Lead Pipes Risk)

Pre-1970 (3%) 1970–1986 (30%) Post-1986 (67%)

Most homes in Redmond were built after 1986, reducing the risk of lead contamination from plumbing. Older homes should still be tested.

Source: U.S. Census Bureau ACS B25034.

How Remediation Costs Compare in Redmond

Equity impact data for Redmond lands in the favorable tier - remediation claims a small slice of what properties here are worth.

Median Home Value

$1.2M

Est. Remediation

$1,800

Remediation as % of home value 0.2%

Remediation costs in Redmond are relatively low compared to home values. The $1,200–$2,600 estimated range is a small fraction of median property value. Home values are 147% above the Washington average.

Redmond: Lead Risk & Vulnerable Populations

33%

Homes Built Before 1986

0.0058

mg/L Avg Lead (Limit: 0.015)

Why children are most at risk: The CDC states there is no safe level of lead exposure for children. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.

Even where utility-side monitoring meets Lead and Copper Rule requirements, the 33% pre-rule share in Redmond keeps interior-plumbing variation as a household-level question that aggregate data cannot resolve.

Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.

Redmond: NFIP Claim Records and Water-Quality Context

23

Total FEMA Flood Claims

$13,199

Avg Reported Sum With Payment Data

0%

A/V Share of Claim-Record ZIPs

Historical NFIP data for Redmond contains 23 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $13,199. Among ZIP codes with claim records, 0% have an A- or V-family dominant rated zone recorded in those historical claims. This is not a complete current FEMA property-map inventory.

How flooding affects water quality: Flood events can introduce sewage, agricultural runoff, and industrial chemicals into water supplies. Even after floodwaters recede, contamination can persist in wells and aging infrastructure. The <strong>$1,800</strong> remediation estimate shown here excludes flood insurance and is not derived from NFIP claim count.

Claim count does not establish current property risk. Check the exact address in FEMA's current map and obtain a property-specific insurance quote when relevant.

Source: historical FEMA National Flood Insurance Program (NFIP) claim records. No current FEMA property-map designation is asserted.