Spokane, WA: High Radon Risk — 68/100 (2026)
29 ZIP codes · 13 water systems · Updated 2026-06-03
While Spokane avoids WA's lowest safety tiers, a portion of its water systems have logged documented violations.
How Spokane Compares
Data: EPA SDWIS Last verified: 2026-06-03
Water Quality Map: Spokane, WA
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Score Distribution
How ZIP codes in Spokane score across all safety grades.
What You Should Know About Spokane Water
- Average lead level: 0.002 mg/L.
- Estimated remediation: $2,217 per household.
- CDC health risk index: 12.04 — above typical levels.
Who Supplies Your Water in Spokane
3 independent water providers serve Spokane, WA — 13 systems appear in federal records.
Overview
We track water quality and home safety data for 29 ZIP codes in Spokane, Washington, covering 13 community water systems serving approximately 389,529 people.
No EPA violations recorded across any ZIP codes in Spokane — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Spokane: C (68/100)
The score combines three factors:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| Lead Levels | 90th percentile lead concentration vs EPA action level |
| Radon Risk | EPA radon zone classification |
Water Sources
Spokane water systems draw from: Groundwater.
Lead & Copper
- Average lead level (90th percentile): 0.0020 mg/L (EPA action level: 0.015 mg/L)
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 1 (High Risk)
- Zone 1 (High): 29 ZIP codes
- Zone 2 (Moderate): 0 ZIP codes
- Zone 3 (Low): 0 ZIP codes
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 99201 | B | City of Spokane | 343,167 |
| 99202 | B | City of Spokane | 343,167 |
| 99203 | B | City of Spokane | 343,167 |
| 99204 | B | City of Spokane | 343,167 |
| 99205 | C | City of Spokane | 343,167 |
| 99206 | B | Spo Company Water District 3 Sys 1 | 18,983 |
| 99207 | B | City of Spokane | 343,167 |
| 99208 | B | City of Spokane | 343,167 |
| 99209 | C | City of Spokane | 343,167 |
| 99210 | B | City of Spokane | 343,167 |
All ZIP Codes in Spokane
- 99201 [B]
- 99202 [B]
- 99203 [B]
- 99204 [B]
- 99205 [C]
- 99206 [B]
- 99207 [B]
- 99208 [B]
- 99209 [C]
- 99210 [B]
- 99211 [C]
- 99212 [B]
- 99213 [C]
- 99214 [C]
- 99215 [C]
- 99216 [C]
- 99217 [B]
- 99218 [B]
- 99219 [C]
- 99220 [C]
- 99223 [B]
- 99224 [B]
- 99228 [C]
- 99251 [C]
- 99252 [C]
- 99256 [C]
- 99258 [C]
- 99260 [C]
- 99299 [C]
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
Updated daily.
Health Outcomes in Spokane
Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
Cost Context: What Remediation Means for Spokane Homeowners
Because property values in Spokane comfortably exceed estimated remediation costs, the equity impact here is proportionally small.
Remediation costs in Spokane are relatively low compared to home values. The $1,486–$2,972 estimated range is a small fraction of median property value. Home values are 24% below the Washington average.
Lead Exposure Risk for Children in Spokane
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.
Lead risk in Spokane appears low overall, but individual homes may differ. Testing is the only way to confirm your water's lead content.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Flood & Climate Risk in Spokane
Flood risk in Spokane occupies the middle ground: 33 NFIP claims and 41% of local ZIP codes within FEMA flood zones. At that level, the risk pathways connecting flooding to water quality — treatment system stress, well infiltration, distribution backflow — become relevant considerations during significant flood events, even if day-to-day water quality is unaffected by flood history.
Spokane has a moderate flood history with 33 FEMA claims averaging $43,925 per payout. 41% of ZIP codes fall within FEMA flood zones. Flood events can contaminate drinking water and overwhelm treatment systems.
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. Flood damage can add significantly to the estimated <strong>$2,217</strong> remediation cost per household.
Residents in flood-prone areas should consider flood insurance even outside FEMA zones — over 25% of flood claims come from low-to-moderate risk areas. After any flood event, test your water before drinking.
Source: FEMA National Flood Insurance Program (NFIP) claims data, FEMA flood zone designations.
What You Can Do in Spokane
- Test your water at home. City-level data shows averages — your tap may differ. NSF-certified test kits cost $20-40 and give results in days.
- Install a certified water filter. An NSF-certified pitcher or under-sink filter removes most common contaminants.
- Check your home's plumbing. Homes built before 1986 may have lead solder in pipes. A licensed plumber can assess your risk.
Deep Dive Reports
Detailed analysis for Spokane, WA