D36/100
TRENTWOOD IRRIGATION DISTRICT 3 — Water Quality Report 2026
Serving 4,228 people · Washington
Water Source
Groundwater
County
—
System ID
WA5389250
Violations
41
Contaminant Test Results
3 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
PFOS | 0.012 µg/L | 0.004 µg/L | Over Limit |
PFOA | 0.005 µg/L | 0.004 µg/L | Over Limit |
Lead (90th percentile) | 0.003 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
3
Violations (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Exceeded the MCL for disinfection byproducts
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: July 1, 2025 – September 30, 2025Enforcement: Resolving — corrective action underway
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2024 – February 26, 2025Enforcement: Resolving — corrective action underway
TIER 3Resolved
Monitoring Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: July 1, 2023 – July 31, 2023Rule: Total Coliform 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 TRENTWOOD IRRIGATION DISTRICT 3
Is TRENTWOOD IRRIGATION DISTRICT 3 water safe to drink?
TRENTWOOD IRRIGATION DISTRICT 3 water receives a grade of D (36/100), which is considered poor. 2 contaminant(s) exceed EPA legal limits and 41 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has TRENTWOOD IRRIGATION DISTRICT 3 detected?
31 contaminants were tested in TRENTWOOD IRRIGATION DISTRICT 3's water. Notable contaminants include PFOS, PFOA, Lead (90th percentile). 2 exceed EPA legal limits (MCLs). 3 exceed EPA health goals (MCLGs).
Does TRENTWOOD IRRIGATION DISTRICT 3 have any EPA violations?
Yes, TRENTWOOD IRRIGATION DISTRICT 3 has 41 EPA violation(s) on record, with the most recent in 2025. Violation types include MR, Other, MON. 1 are health-based violations.
How many people does TRENTWOOD IRRIGATION DISTRICT 3 serve?
TRENTWOOD IRRIGATION DISTRICT 3 serves approximately 4,228 people, Washington.
What type of water does TRENTWOOD IRRIGATION DISTRICT 3 provide?
TRENTWOOD IRRIGATION DISTRICT 3 sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is WA5389250.
How does TRENTWOOD IRRIGATION DISTRICT 3 compare to other utilities in Washington?
TRENTWOOD IRRIGATION DISTRICT 3 scores 36/100 with a grade of D (poor). This score suggests significant water quality concerns relative to other utilities. Visit our Washington state page for a full comparison of water systems.