D33/100
ARCO CITY OF — Water Quality Report 2026
Serving 1,080 people · Idaho
Water Source
Groundwater
County
—
System ID
ID6120001
Violations
36
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.002 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
2
Violations (last 5yr)
1
Unresolved
1
Health-Related
TIER 3Unresolved
Violation related to E. coli (RTCR)
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: July 1, 2025 – July 31, 2025Rule: Consumer Confidence RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 1 — URGENTResolved
Maximum Contaminant Level Violation
When: August 1, 2022 – August 31, 2022Rule: 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 ARCO CITY OF
Is ARCO CITY OF water safe to drink?
ARCO CITY OF water receives a grade of D (33/100), which is considered poor. 0 contaminant(s) exceed EPA legal limits and 36 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has ARCO CITY OF detected?
1 contaminants were tested in ARCO CITY OF's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does ARCO CITY OF have any EPA violations?
Yes, ARCO CITY OF has 36 EPA violation(s) on record, with the most recent in 2025. Violation types include MR, MCL. 7 are health-based violations.
How many people does ARCO CITY OF serve?
ARCO CITY OF serves approximately 1,080 people, Idaho.
What type of water does ARCO CITY OF provide?
ARCO CITY OF sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is ID6120001.
How does ARCO CITY OF compare to other utilities in Idaho?
ARCO CITY OF scores 33/100 with a grade of D (poor). This score suggests significant water quality concerns relative to other utilities. Visit our Idaho state page for a full comparison of water systems.