TapSafetyReport
C44/100

RAINBOW WATER DISTRICT — Water Quality Report 2026

Serving 6,300 people · Oregon

Water Source
Groundwater Under Influence of Surface Water
County
—
System ID
OR4100839
Violations
29

Contaminant Test Results

3 contaminants above EPA health goals
ContaminantDetectedLimit (MCL)Status
Copper (90th percentile)
1.93 mg/L1.30 mg/LOver Limit
PFOS
0.007 µg/L0.004 µg/LOver Limit
Lead (90th percentile)
0.002 mg/L0.015 mg/LAbove Goal

EPA Violation History

5

Violations (last 5yr)

1

Unresolved

1

Health-Related

TIER 3Unresolved

Monitoring Violation

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: August 1, 2025 – August 31, 2025Rule: Total Coliform RuleVerify on EPA.gov
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: February 1, 2025 – February 28, 2025Rule: 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: February 1, 2025 – February 28, 2025Rule: 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: February 1, 2025 – February 28, 2025Rule: Surface Water Treatment RuleEnforcement: Resolving — corrective action underway
TIER 2Resolved

Violation related to Coliform (pre-2016 TCR)

When: September 13, 2022 – October 5, 2022Rule: 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 RAINBOW WATER DISTRICT

Is RAINBOW WATER DISTRICT water safe to drink?

RAINBOW WATER DISTRICT water receives a grade of C (44/100), which is considered fair. 2 contaminant(s) exceed EPA legal limits and 29 violation(s) are on record. Customers may want to consider using a water filter.

What contaminants has RAINBOW WATER DISTRICT detected?

52 contaminants were tested in RAINBOW WATER DISTRICT's water. Notable contaminants include PFOS, Copper (90th percentile), Lead (90th percentile). 2 exceed EPA legal limits (MCLs). 3 exceed EPA health goals (MCLGs).

Does RAINBOW WATER DISTRICT have any EPA violations?

Yes, RAINBOW WATER DISTRICT has 29 EPA violation(s) on record, with the most recent in 2025. Violation types include MON, MR, TT. 2 are health-based violations.

How many people does RAINBOW WATER DISTRICT serve?

RAINBOW WATER DISTRICT serves approximately 6,300 people, Oregon.

What type of water does RAINBOW WATER DISTRICT provide?

RAINBOW WATER DISTRICT sources its water from groundwater under influence of surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is OR4100839.

How does RAINBOW WATER DISTRICT compare to other utilities in Oregon?

RAINBOW WATER DISTRICT scores 44/100 with a grade of C (fair). This score indicates room for improvement compared to other utilities. Visit our Oregon state page for a full comparison of water systems.