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D30/100

Basin City Water Sewer District — Water Quality Report 2026

Serving 1,740 people · Washington

Water Source
Groundwater
County
—
System ID
WA5304461
Violations
42

Contaminant Test Results

EPA Violation History

12

Violations (last 5yr)

1

Unresolved

1

Health-Related

TIER 3Resolved

Surface water treatment technique failure

When: July 1, 2025 – September 16, 2025Enforcement: Resolving — corrective action underway
TIER 1 — URGENTUnresolved

Exceeded the Maximum Contaminant Level (single sample)

When: January 1, 2025 – July 31, 2025Verify on EPA.gov
TIER 3Resolved

Monitoring Violation

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

When: May 1, 2024 – May 31, 2024Rule: Total Coliform RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved

Surface water treatment technique failure

When: July 1, 2023 – October 3, 2023Enforcement: 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: April 1, 2023 – April 30, 2023Rule: Total Coliform RuleEnforcement: 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: December 1, 2022 – December 31, 2022Rule: Total Coliform RuleEnforcement: 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: September 1, 2022 – September 30, 2022Rule: Total Coliform RuleEnforcement: 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, 2022 – July 31, 2022Rule: Total Coliform RuleEnforcement: Resolving — corrective action underway
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: January 1, 2022 – December 31, 2022Enforcement: Resolving — corrective action underway
TIER 3Resolved

Failed Level 2 Assessment under Revised Total Coliform Rule

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

When: January 1, 2022 – December 31, 2022Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved

Failed Level 2 Assessment under Revised Total Coliform Rule

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

When: January 1, 2022 – December 31, 2022Rule: Stage 2 DBPREnforcement: 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: December 1, 2021 – December 31, 2021Rule: 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 Basin City Water Sewer District

Is Basin City Water Sewer District water safe to drink?

Basin City Water Sewer District water receives a grade of D (30/100), which is considered poor. 0 contaminant(s) exceed EPA legal limits and 42 violation(s) are on record. Customers may want to consider using a water filter.

What contaminants has Basin City Water Sewer District detected?

1 contaminants were tested in Basin City Water Sewer District's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.

Does Basin City Water Sewer District have any EPA violations?

Yes, Basin City Water Sewer District has 42 EPA violation(s) on record, with the most recent in 2025. Violation types include Other, MCL, MON. 7 are health-based violations.

How many people does Basin City Water Sewer District serve?

Basin City Water Sewer District serves approximately 1,740 people, Washington.

What type of water does Basin City Water Sewer District provide?

Basin City Water Sewer District sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is WA5304461.

How does Basin City Water Sewer District compare to other utilities in Washington?

Basin City Water Sewer District scores 30/100 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.