Lead in Washington Drinking Water — 363 ZIPs Tested
EPA data analysis for lead in Washington drinking water systems
ZipCheckup tracks Lead in Washington drinking water: 363 ZIP codes with detected levels on record. 134 ZIP codes exceed the EPA limit (15 ppb (action level)). Lead carries a high health-risk designation.
Lead Contamination in Washington
ZipCheckup analyzed drinking water data across 422 ZIP codes in Washington for lead contamination. 363 ZIP codes have reported lead detections, and 134 have EPA violations on record.
The violation rate for lead in Washington is 31.8% of all ZIP codes — higher than the national average.
EPA Standard for Lead
The EPA maximum contaminant level (MCL) for lead is 15 ppb (action level), governed by the Lead and Copper Rule (LCRR/LCRI). Water systems that exceed this limit must take corrective action and notify consumers.
Worst ZIP Codes for Lead in Washington
These ZIP codes reported the highest lead levels in Washington based on CCR reports and EPA data:
Lowest Lead Levels in Washington
These ZIP codes had the lowest reported lead detections in Washington:
Health Effects of Lead
Lead is a potent neurotoxin with no safe level of exposure. In children, lead causes developmental delays, reduced IQ, and behavioral problems. In adults, it causes high blood pressure, kidney damage, and cardiovascular effects. Pregnant women face increased risk of premature birth.
How to Remove Lead From Drinking Water
The most effective treatment for lead removal is Reverse Osmosis or NSF 53 Carbon Block. Look for filters certified under NSF 53 / NSF 58 standards.
Check Your ZIP Code
Use the ZipCheckup water quality search to see lead data for your specific water system in Washington.
Worst ZIP Codes for Lead in Washington
Ranked by highest lead detection level.
| Rank | ZIP Code | City | Level Detected | EPA Limit | Status |
|---|---|---|---|---|---|
| 1 | 98260 | Langley | 105 ppb | 15 ppb | Exceeds |
| 2 | 98277 | Oak Harbor | 49 ppb | 15 ppb | Exceeds |
| 3 | 98537 | Cosmopolis | 23 ppb | 15 ppb | Exceeds |
| 4 | 98577 | Raymond | 23 ppb | 15 ppb | Exceeds |
| 5 | 98586 | South Bend | 23 ppb | 15 ppb | Exceeds |
| 6 | 99016 | Greenacres | 21 ppb | 15 ppb | Exceeds |
| 7 | 99023 | Mica | 21 ppb | 15 ppb | Exceeds |
| 8 | 99030 | Rockford | 21 ppb | 15 ppb | Exceeds |
| 9 | 99036 | Valleyford | 21 ppb | 15 ppb | Exceeds |
| 10 | 99037 | Veradale | 21 ppb | 15 ppb | Exceeds |
| 11 | 99206 | Spokane | 21 ppb | 15 ppb | Exceeds |
| 12 | 99216 | Spokane | 21 ppb | 15 ppb | Exceeds |
| 13 | 99223 | Spokane | 21 ppb | 15 ppb | Exceeds |
| 14 | 98631 | Long Beach | 20 ppb | 15 ppb | Exceeds |
| 15 | 98640 | Ocean Park | 20 ppb | 15 ppb | Exceeds |
| 16 | 98641 | Oysterville | 20 ppb | 15 ppb | Exceeds |
| 17 | 98110 | Bainbridge Island | 16 ppb | 15 ppb | Exceeds |
| 18 | 98387 | Spanaway | 13 ppb | 15 ppb | Within Limit |
| 19 | 98446 | Tacoma | 13 ppb | 15 ppb | Within Limit |
| 20 | 98597 | Yelm | 13 ppb | 15 ppb | Within Limit |
Lowest Lead Levels in Washington
Cities with Lead Data in Washington
139 cities in Washington have lead testing data available.
+ 119 more cities