F15/100
Idaho Falls Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 93,600 residents · Idaho
What's In Idaho Falls's Tap Water?
66
Contaminants Tested
0
Exceed EPA Limits
1
Above EPA Goals
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.004 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2020.
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
COMORE LOMA
Population Served
1,500
Water Source
Groundwater
System ID
ID7100020
FALLS WATER COMPANY INC
Population Served
22,650
Water Source
Groundwater
System ID
ID7100030
IDAHO FALLS CITY OF
Population Served
69,450
Water Source
Groundwater
System ID
ID7100039
Frequently Asked Questions About Idaho Falls Water
Is Idaho Falls tap water safe to drink?
Idaho Falls, Idaho tap water receives a grade of F (15/100), which is considered failing. 0 contaminant(s) exceed EPA maximum contaminant levels and 192 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in Idaho Falls's water?
Of the 66 contaminants tested in Idaho Falls's water supply, the most notable include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Idaho Falls have any water quality violations?
Yes, Idaho Falls has 192 EPA violation(s) on record, with the most recent in 2023. Violation types include MR, TT, MON. 21 of these are health-based violations, which are the most serious category.
Do I need a water filter in Idaho Falls?
Idaho Falls 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. 1 contaminant(s) exceed these stricter goals.
Where does Idaho Falls's tap water come from?
Idaho Falls's drinking water is sourced from groundwater and supplied by COMORE LOMA and 2 other water system(s). The system serves approximately 93,600 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Idaho Falls'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. Idaho Falls'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 Idaho Falls's water compare to other cities in Idaho?
Idaho Falls's water quality score of 15/100 earns a grade of F, which is considered failing. 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 Idaho Falls's water quality?
If you have concerns about Idaho Falls'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 (COMORE LOMA) 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.