Tri-city Water District #45
EPA ID: WA5389400 · 300 people served · 1 ZIP code
ZipCheckup's reading of EPA SDWIS for Tri-city Water District #45 (WA5389400): no EPA violations recorded in the last five years. Water monitoring history at Tri-city Water District #45 shows a clean slate - EPA tracking over the past five years turned up no violations, and 300 residents continue to receive fully compliant service.
Data: EPA SDWIS
Service Area Map
Coverage area for Tri-city Water District #45 Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Tri-city Water District #45 serves a community with a median household income of $96,875 and an estimated 36,641 residents across its service area.
Environmental Justice Note: 31% of the population in this service area is classified as disadvantaged under EPA's EJScreen criteria. Communities with higher disadvantaged populations often face disproportionate environmental and health burdens, including aging water infrastructure and limited resources for remediation.
💧 Where Does Your Water Come From?
Tri-city Water District #45's water is pumped from underground aquifers. Groundwater is naturally filtered through rock and soil, but it can be vulnerable to PFAS contamination, nitrates from agriculture, and industrial chemicals that seep into the water table.
Superfund Proximity Note: This service area ranks in the 60th percentile nationally for proximity to Superfund (NPL) sites. Groundwater sources near contaminated sites may face elevated risk from industrial chemicals.
Infrastructure Risk
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 8 detections recorded. 2 exceed federal EPA limits (4 ppt for PFOA/PFOS). 2 exceed state limits.
Comparable Water Systems
Similar-sized systems in Washington
Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
Tri-city Water District #45 (EPA ID: WA5389400) is a community water system in Washington that serves approximately 300 people from groundwater sources.
This system serves ZIP code 99352 in Richland.
Violation History
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.0044 mg/L | No | N/A |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
Need help with your water quality?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.
ZIP Codes Served
Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by WA or modeled from parcel and building-footprint data.
- 99352 - Richland
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Tri-city Water District #45 (WA5389400) on EPA.gov.
Frequently Asked Questions
Is Tri-city Water District #45 water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Tri-city Water District #45 in the inclusive 2021-2026 record-year window. This is a compliance-record finding, not a guarantee about water at a specific tap.
How many people does Tri-city Water District #45 serve?
Tri-city Water District #45 serves approximately 300 people across 1 ZIP code in Washington.
Where does Tri-city Water District #45 get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Tri-city Water District #45 Water Quality Report, WA. https://zipcheckup.com/water-system/wa5389400/
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title = {{Tri-city Water District #45 Water Quality Report, WA}},
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url = {https://zipcheckup.com/water-system/wa5389400/}
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