Grand Ronde Community Wtr Assn
EPA ID: OR4100338 · 2,500 people served · 6 ZIP codes
Grand Ronde Community Wtr Assn carries 9 open EPA violations that remain unresolved in the federal system — approximately 2,500 people fall within its service area.
Data: EPA SDWIS Last verified: 2026-04-02
Compliance Trajectory
Worsening · Risk tier: High · 95% chance of violation in next 12 months
Violations went from 6 (2023) to 3 (2025). The pattern suggests growing compliance challenges.
Service Area Map
Coverage area for Grand Ronde Community Wtr Assn Source: EPA SDWIS service area boundaries.
Service area boundary — Grade A
Service Area Demographics
The Grand Ronde Community Wtr Assn serves a community with a median household income of $62,322 and an estimated 52,937 residents across its service area. Approximately 54% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Grand Ronde Community Wtr Assn'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.
About 2% of homes in Polk County, Oregon rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Infrastructure Risk
Detected Contaminants
How Grand Ronde Community Wtr Assn compares to EPA limits
What This Means For You
E. coli at 9 Zero tolerance (any positive sample triggers immediate action) exceeds the EPA maximum of Zero tolerance (any positive sample triggers immediate action). Severe GI illness; potentially fatal kidney failure in children. Consider UV disinfection (99.99%) filtration.
Fecal Coliform at 7 presence exceeds the EPA maximum of presence.
Surface Water Treatment Rule at 6 mg/L exceeds the EPA maximum of mg/L.
Lead and Copper Rule at 3 mg/L exceeds the EPA maximum of mg/L.
Total Coliform at 1 presence exceeds the EPA maximum of presence.
E. coli was detected in this water system. UV disinfection (99.99%) filtration can reduce exposure.
Find a certified water filter →Comparable Water Systems
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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
Grand Ronde Community Wtr Assn (EPA ID: OR4100338) is a community water system in Oregon that serves approximately 2,500 people from groundwater sources.
This system provides water to 6 ZIP codes across 6 communities.
Average Home Safety Score: A (93/100)
Based on water quality violations, lead levels, and radon risk across all ZIP codes served by this system.
Violation History
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| September 28, 2025 | Lead and Copper Rule | Monitoring | Unresolved |
| July 1, 2025 | Surface Water Treatment Rule | Monitoring | Unresolved |
| March 23, 2025 | Lead and Copper Rule | Monitoring | Unresolved |
| March 7, 2025 | Lead and Copper Rule | Monitoring | Unresolved |
| March 1, 2025 | E. coli | Monitoring | Resolved |
| March 1, 2025 | Fecal Coliform | Monitoring | Resolved |
| January 1, 2025 | E. coli | Health-based | Resolved |
| December 1, 2024 | E. coli | Health-based | Resolved |
| October 1, 2024 | Surface Water Treatment Rule | Monitoring | Unresolved |
| July 1, 2024 | Surface Water Treatment Rule | Monitoring | Resolved |
| July 1, 2024 | E. coli | Monitoring | Resolved |
| July 1, 2024 | Fecal Coliform | Monitoring | Resolved |
| October 1, 2023 | Surface Water Treatment Rule | Monitoring | Unresolved |
| October 1, 2023 | E. coli | Monitoring | Resolved |
| October 1, 2023 | Fecal Coliform | Monitoring | Resolved |
| September 1, 2023 | E. coli | Monitoring | Unresolved |
| September 1, 2023 | Fecal Coliform | Monitoring | Unresolved |
| July 1, 2023 | Surface Water Treatment Rule | Monitoring | Resolved |
| June 1, 2023 | E. coli | Monitoring | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| E. coli | Microbiological | 9 | Yes |
| Fecal Coliform | Microbiological | 7 | No |
| Surface Water Treatment Rule | Treatment Failure | 6 | No |
| Lead and Copper Rule | Treatment Failure | 3 | No |
| Total Coliform | Microbiological | 1 | No |
| Gross Alpha | Radionuclides | 1 | No |
Health Risk Details
E. coli (EPA limit: Zero tolerance (any positive sample triggers immediate action))
Severe GI illness; potentially fatal kidney failure in children At-risk groups: children under 5, elderly, immunocompromised individuals, pregnant women.
Removal methods: UV disinfection (99.99%), chlorination, reverse osmosis. Find the right filter →
Lead & Copper
EPA Lead and Copper Rule sampling data for ZIP codes served by this system:
| ZIP Code | Lead Level | Exceeds Limit | Sample Date |
|---|---|---|---|
| 97347 | 0.0023 mg/L | No | N/A |
Radon Risk in Service Area
Dominant radon zone for ZIP codes served by this system: Zone 3 (Low Risk)
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 OR or modeled from parcel and building-footprint data.
- 97338 — Dallas
- 97344 — Falls City
- 97347 — Grand Ronde
- 97361 — Monmouth
- 97378 — Sheridan
- 97396 — Willamina
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Grand Ronde Community Wtr Assn (OR4100338) on EPA.gov.
Frequently Asked Questions
Is Grand Ronde Community Wtr Assn water safe to drink?
Grand Ronde Community Wtr Assn has recorded 2 health-based violations in the past 5 years. While the system is required to treat water to meet federal standards, you may want to consider additional precautions such as a certified water filter.
How many people does Grand Ronde Community Wtr Assn serve?
Grand Ronde Community Wtr Assn serves approximately 2,500 people across 6 ZIP codes in Oregon.
Where does Grand Ronde Community Wtr Assn get its water?
The primary water source is groundwater.
Lead Service Line Inventory
Service line breakdown reported under the federal Lead and Copper Rule Improvements (LCRI) inventory requirement:
This system reports zero confirmed lead service lines in its inventory. Unknown-material counts may still warrant verification.
Federal LCRI rule (effective October 2024) requires every public water system to inventory its service lines and complete lead-line replacement within 10 years.
Source: EPA SDWIS Federal Service Line Inventory (Phase 2) · Submitted 2026
ZipCheckup is not affiliated with the utility or state agency. Inventory figures render verbatim from the public LCRI submission cited above; ZipCheckup does not perform inspections or replacements.
Frequently Asked Questions
What You Can Do
Test your water
Home test kits can detect lead, bacteria, and other contaminants at your tap. Find the right filter →
Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
Grand Ronde Community Wtr Assn (EPA ID: OR4100338) — request the latest Consumer Confidence Report or ask about specific contaminants.