D34/100
HILLSBORO-CHERRY GROVE — Water Quality Report 2026
Serving 1,628 people · Oregon
Water Source
Surface Water
County
—
System ID
OR4100985
Violations
47
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.006 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
4
Violations (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2025 – July 8, 2025Enforcement: Resolving — corrective action underway
TIER 3Resolved
Failed to complete routine monitoring
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: July 1, 2023 – July 31, 2023Rule: Surface Water Treatment RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Missed required monitoring deadline
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: July 1, 2023 – July 31, 2023Rule: Surface Water Treatment RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Failed to complete routine monitoring
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: July 1, 2023 – July 31, 2023Rule: Surface Water Treatment RuleEnforcement: Resolving — corrective action underway
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Frequently Asked Questions About HILLSBORO-CHERRY GROVE
Is HILLSBORO-CHERRY GROVE water safe to drink?
HILLSBORO-CHERRY GROVE water receives a grade of D (34/100), which is considered poor. 0 contaminant(s) exceed EPA legal limits and 47 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has HILLSBORO-CHERRY GROVE detected?
4 contaminants were tested in HILLSBORO-CHERRY GROVE's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does HILLSBORO-CHERRY GROVE have any EPA violations?
Yes, HILLSBORO-CHERRY GROVE has 47 EPA violation(s) on record, with the most recent in 2025. Violation types include Other, MR, TT. 4 are health-based violations.
How many people does HILLSBORO-CHERRY GROVE serve?
HILLSBORO-CHERRY GROVE serves approximately 1,628 people, Oregon.
What type of water does HILLSBORO-CHERRY GROVE provide?
HILLSBORO-CHERRY GROVE sources its water from surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is OR4100985.
How does HILLSBORO-CHERRY GROVE compare to other utilities in Oregon?
HILLSBORO-CHERRY GROVE scores 34/100 with a grade of D (poor). This score suggests significant water quality concerns relative to other utilities. Visit our Oregon state page for a full comparison of water systems.