Oysterville, WA Water Safety: 99/100 (2026)
1 ZIP code · 3 water systems · Updated 2026-06-03
For households in Oysterville, WA water data shows a consistently above-average safety picture.
How Oysterville Compares
Data: EPA SDWIS Last verified: 2026-06-03
What You Should Know About Oysterville Water
- Average lead level: 0.004 mg/L.
- Homes built before 1986: 28% — older plumbing may contain lead solder.
- CDC health risk index: 15.07 — above typical levels.
Who Supplies Your Water in Oysterville
3 water utilities share the residential service territory in Oysterville, WA — out of 3 total systems in federal records.
Overview
We track water quality and home safety data for 1 ZIP code in Oysterville, Washington (population ~221), covering 3 community water systems serving approximately 10,852 people region-wide.
No EPA violations recorded across any ZIP codes in Oysterville — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Oysterville: A (99/100)
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
Oysterville water systems draw from: Groundwater.
Lead & Copper
- Average lead level (90th percentile): 0.0040 mg/L (EPA action level: 0.015 mg/L)
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 3 (Low Risk)
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 98641 | A | Oysterville Water | 72 |
All ZIP Codes in Oysterville
- 98641 [A]
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 Oysterville
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
Housing & Infrastructure in Oysterville
Housing age data helps assess potential lead pipe and infrastructure risks. Newer housing stock generally means lower plumbing-related contamination risk.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
Lead exposure in tap water isn't just a function of what water utilities deliver — it's also shaped by the plumbing inside individual homes. Structures built before 1986 may contain lead-soldered copper joints, and homes built before 1970 face an additional risk from lead pipes themselves. Oysterville's median build year of 1997 suggests the housing stock is broadly weighted toward the safer post-1986 era, but the age distribution shown above makes clear that the pre-1986 share of the inventory still represents a meaningful fraction worth understanding for anyone in an older home.
Most homes in Oysterville 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.
Lead Exposure Risk for Children in Oysterville
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.
28% — that captures the slice of Oysterville stock built before federal rules removed lead-bearing solder from new construction. Combined with system samples below the regulatory action mark, the picture points to a quiet baseline, with one-home draws as the only direct read on a specific address.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Deep Dive Reports
Detailed analysis for Oysterville, WA