Bonney Lake, WA Water Safety: 65/100 (2026)
1 ZIP code · 7 water systems · Updated 2026-06-04
Compared to top-scoring cities in WA, Bonney Lake lands in the middle tier — some water systems meet standards cleanly, others carry documented violations, and performance can vary significantly across service areas.
How Bonney Lake Compares
Data: EPA SDWIS Last verified: 2026-06-04
Bonney Lake Water: The Quick Version
- Homes built before 1986: 31% — older plumbing may contain lead solder.
- Estimated remediation: $1,700 per household.
- CDC health risk index: 11.95.
Water Systems Serving Bonney Lake
Residential addresses in Bonney Lake, WA are served by 3 primary water providers out of 7 systems in federal records. Each system maintains separate infrastructure and files its own EPA compliance reports, so service conditions are not uniform across the city.
Overview
We track water quality and home safety data for 1 ZIP code in Bonney Lake, Washington (population ~57,691), covering 7 community water systems serving approximately 624,259 people region-wide.
No EPA violations recorded across any ZIP codes in Bonney Lake — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Bonney Lake: C (65/100)
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
Bonney Lake water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Bonney Lake
- 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 |
|---|---|---|---|
| 98391 | C | SOUTH PRAIRIE TOWN OF | 489 |
All ZIP Codes in Bonney Lake
- 98391 [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.
CDC Health Data for Bonney Lake
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
How Old Is Bonney Lake's Housing Stock?
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
Over the decades, Bonney Lake accumulated housing from multiple construction periods. The median build year of 1993 places the midpoint of that stock near the 1986 threshold when lead solder in plumbing became federally prohibited — leaving a sizable share of homes on each side of that safety line.
Most homes in Bonney Lake 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.
Bonney Lake: Remediation Cost in Perspective
How much of a Bonney Lake home's value does documented remediation represent? A small fraction — the equity share here is in the low tier, and from a household financial perspective, most property owners are considering a commitment that fits comfortably within standard planning rather than a decision that rises to the level of a material budget event or significant equity consideration.
Remediation costs in Bonney Lake are relatively low compared to home values. The $1,100–$2,600 estimated range is a small fraction of median property value. Home values are 24% above the Washington average.
Protecting Children from Lead in Bonney Lake
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.
Pulling a tap sample fills the gap that utility data cannot close, particularly here where 31% of housing dates from the pre-rule era and citywide monitoring sits at or above the regulatory mark in Bonney Lake.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Climate-Related Water Risk for Bonney Lake
FEMA data shows 100% of Bonney Lake's ZIP codes mapped into designated flood zones, paired with an NFIP record of 15 claims. That footprint places local flood exposure in the range where it warrants attention without rising to high-severity planning territory.
Bonney Lake has a moderate flood history with 15 FEMA claims averaging $11,067 per payout. 100% 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>$1,700</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 Bonney Lake
- 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. With 31% of homes built before 1986, lead solder is a real possibility.
Deep Dive Reports
Detailed analysis for Bonney Lake, WA