TapSafetyReport
F0/100

TWIN FALLS CITY OF — Water Quality Report 2026

Serving 56,121 people · Idaho

Water Source
Groundwater
County
—
System ID
ID5420058
Violations
58

Contaminant Test Results

1 contaminant above EPA health goals
ContaminantDetectedLimit (MCL)Status
vanadium
31.30 µg/L—Above Goal

EPA Violation History

4

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: January 1, 2023 – December 31, 2023Enforcement: Resolving — corrective action underway
TIER 3Resolved

Consumer confidence report — inadequate or unavailable

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

When: July 1, 2022 – December 11, 2024Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved

Consumer confidence report — inadequate or unavailable

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

When: July 1, 2022 – December 11, 2024Rule: Ground Water 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

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 TWIN FALLS CITY OF

Is TWIN FALLS CITY OF water safe to drink?

TWIN FALLS CITY OF water receives a grade of F (0/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 58 violation(s) are on record. Customers may want to consider using a water filter.

What contaminants has TWIN FALLS CITY OF detected?

66 contaminants were tested in TWIN FALLS CITY OF's water. Notable contaminants include vanadium. No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).

Does TWIN FALLS CITY OF have any EPA violations?

Yes, TWIN FALLS CITY OF has 58 EPA violation(s) on record, with the most recent in 2023. Violation types include MR, Other, MCL. 35 are health-based violations.

How many people does TWIN FALLS CITY OF serve?

TWIN FALLS CITY OF serves approximately 56,121 people, Idaho.

What type of water does TWIN FALLS CITY OF provide?

TWIN FALLS CITY OF sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is ID5420058.

How does TWIN FALLS CITY OF compare to other utilities in Idaho?

TWIN FALLS CITY OF scores 0/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our Idaho state page for a full comparison of water systems.