Redmond, WA carries a grade in ZipCheckup's upper tier; any health-based violations on record should be checked per water system.

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 of reported 90th-percentile lead results: 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

3 of 3 ZIP records with known zones are in EPA Radon Zone 3.

The EPA recommends testing all homes regardless of radon zone. County radon zones cannot replace an in-home radon test.

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

Over the decades, Redmond accumulated housing from multiple construction periods. The median build year of 1994 can be read against 1986, when lead solder in plumbing became federally prohibited - a regulatory line, not a safety line, and individual homes on either side of it can have different plumbing.

1994

Median Year Built

33%

Pre-1986 (lead solder era; lead paint banned 1978)

8%

Pre-1970 (Lead Pipes Risk)

Pre-1970 (8%) 1970–1986 (25%) Post-1986 (67%)

Most homes in Redmond were built after 1986; lead exposure at a tap still depends on its service line and plumbing. Older homes should still be tested.

Source: U.S. Census Bureau ACS B25034.

How Remediation Costs Compare in Redmond

Because the median home value in Redmond is large relative to the estimated cost of remediation, the ratio between them stays at or below 1%; that is a statement about two area-level numbers, not a quote for a particular house or a judgment about what an owner can pay.

Median Home Value

$1.2M

Est. Remediation

$550

Remediation as % of home value 0.1%

Estimated remediation costs in Redmond can be compared with local home values. The $350–$800 estimated range can be set against the median property value; actual costs vary by home. Home values are 147% above the Washington average.

Redmond: Lead Risk & Vulnerable Populations

33%

Homes Built Before 1986

0.0058

mg/L average of reported water-system 90th-percentile lead results (the 0.015 action level applies to each system's result, not to this average)

Why children are most at risk: The CDC states that no safe blood lead level in children has been identified. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.

If you have young children or are pregnant, consider testing your home's water - especially if your home was built before 1986.

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 $550 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.