D39/100
Iona Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 2,717 residents · Idaho
What's In Iona's Tap Water?
1
Contaminants Tested
0
Exceed EPA Limits
0
Above EPA Goals
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2015.
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
Water Utility Details
IONA WATER DEPT
Population Served
2,717
Water Source
Groundwater
System ID
ID7100041
Frequently Asked Questions About Iona Water
Is Iona tap water safe to drink?
Iona, Idaho tap water receives a grade of D (39/100), which is considered poor. 0 contaminant(s) exceed EPA maximum contaminant levels and 25 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in Iona's water?
1 contaminants were tested in Iona's water supply. No contaminants exceed EPA legal limits (MCLs) or health goals (MCLGs), which is a positive indicator of water quality.
Does Iona have any water quality violations?
Yes, Iona has 25 EPA violation(s) on record, with the most recent in 2015. Violation types include MCL, MR. 9 of these are health-based violations, which are the most serious category.
Do I need a water filter in Iona?
Iona water meets EPA standards, so a filter is not strictly necessary. However, some residents prefer the added security of a water filter. EPA health goals (MCLGs) are stricter than legal limits and are set at levels with zero expected health risk. All contaminants are within health goals.
Where does Iona's tap water come from?
Iona's drinking water is sourced from groundwater and supplied by IONA WATER DEPT. The system serves approximately 2,717 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Iona's water tested?
Under the Safe Drinking Water Act (SDWA), water utilities are required to regularly test for over 90 contaminants. Testing frequency varies by contaminant — some are tested monthly, others quarterly or annually. Iona's water systems must report results to the EPA and publish an annual Consumer Confidence Report (CCR). The data on this page reflects the latest available EPA testing data.
How does Iona's water compare to other cities in Idaho?
Iona's water quality score of 39/100 earns a grade of D, which is considered poor. This is a concerning score that suggests significant water quality issues. Visit our Idaho state page to see how all cities in the state compare.
What should I do if I'm concerned about Iona's water quality?
If you have concerns about Iona's tap water, consider these steps: (1) Request your utility's annual Consumer Confidence Report for detailed local data. (2) Get your water independently tested through a state-certified laboratory. (3) Consider an NSF-certified water filter rated for the contaminants found in your area. (4) Contact your water utility (IONA WATER DEPT) with specific questions. (5) Report water quality issues to your state drinking water program or the EPA Safe Drinking Water Hotline at 800-426-4791.