Hydro Irrigation District No 9
EPA ID: WA5335275 · 260 people served · 1 ZIP code
ZipCheckup's reading of EPA SDWIS for Hydro Irrigation District No 9 (WA5335275): no EPA violations recorded in the last five years. Hydro Irrigation District No 9 earns a clean bill from EPA monitoring - no violations in five years across a service area of 260 people.
Data: EPA SDWIS
Service Area Map
Coverage area for Hydro Irrigation District No 9 Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Hydro Irrigation District No 9 serves a community with a median household income of $70,660 and an estimated 42,794 residents across its service area. Approximately 68% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Hydro Irrigation District No 9'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.
Infrastructure Risk
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
Hydro Irrigation District No 9 (EPA ID: WA5335275) is a community water system in Washington that serves approximately 260 people from groundwater sources.
This system serves ZIP code 99362 in Walla Walla.
Violation History
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0 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.
- 99362 - Walla Walla
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Hydro Irrigation District No 9 (WA5335275) on EPA.gov.
Frequently Asked Questions
Is Hydro Irrigation District No 9 water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Hydro Irrigation District No 9 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 Hydro Irrigation District No 9 serve?
Hydro Irrigation District No 9 serves approximately 260 people across 1 ZIP code in Washington.
Where does Hydro Irrigation District No 9 get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Hydro Irrigation District No 9 Water Quality Report, WA. https://zipcheckup.com/water-system/wa5335275/
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title = {{Hydro Irrigation District No 9 Water Quality Report, WA}},
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url = {https://zipcheckup.com/water-system/wa5335275/}
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