Tap WaterIndex

← Idaho

Tap water quality report

Iona, ID

EPA monitoring detected 10 contaminants across the 2 water suppliers serving Iona. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

2
water suppliers
2,892
people served
10
contaminants found
Idaho rankings Lead in Idaho PFAS in Idaho

What was found in Iona's water

The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate-Nitrite
2799 µg/L 28%
of the EPA limit 10000 µg/L
Main supplier: IONA WATER DEPT · 2,717 people · 2019
2/2 SYR4
Nitrate
2580 µg/L 26%
of the EPA limit 10000 µg/L
Main supplier: IONA WATER DEPT · 2,717 people · 2019
2/2 SYR4
Fluoride
400 µg/L 10%
of the EPA limit 4000 µg/L
Main supplier: IONA WATER DEPT · 2,717 people · 2019
2/2 SYR4
Barium
119 µg/L 5.9%
of the EPA limit 2000 µg/L
Main supplier: IONA WATER DEPT · 2,717 people · 2019
2/2 SYR4
Arsenic
2 µg/L 20%
of the EPA limit 10 µg/L
Main supplier: IONA WATER DEPT · 2,717 people · 2019
2/2 SYR4
Combined Uranium
1.69 µg/L 5.6%
of the EPA limit 30 µg/L
Main supplier: IONA WATER DEPT · 2,717 people · 2019
Highest in the city: 1.895 µg/L — PANORAMA HILLS WATER COMPANY · 175 people · 2013
2/2 SYR4
Combined Radium (-226 And -228)
1.169 pCi/L 23%
of the EPA limit 5 pCi/L
Main supplier: IONA WATER DEPT · 2,717 people · 2016
Highest in the city: 1.217 pCi/L — PANORAMA HILLS WATER COMPANY · 175 people · 2019
2/2 SYR4
Chromium
1 µg/L 1%
of the EPA limit 100 µg/L
Main supplier: IONA WATER DEPT · 2,717 people · 2019
2/2 SYR4
Dichloromethane
0.5700 µg/L 11%
of the EPA limit 5 µg/L
Main supplier: IONA WATER DEPT · 2,717 people · 2019
1/2 SYR4
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: IONA WATER DEPT · 2,717 people · 2023
2/2 LCR
Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of the system's samples — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Iona

SupplierPopulation served
IONA WATER DEPT 2,717
PANORAMA HILLS WATER COMPANY 175

Frequently asked questions about Iona tap water

Is Iona tap water safe to drink?

EPA testing detected 10 contaminants in the water serving Iona. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve Iona?

2 public water suppliers report drinking-water monitoring for Iona, Idaho to the EPA. Each is listed above with its population served.

What contaminants are in Iona's water?

The contaminants EPA monitoring detected in Iona include Nitrate-Nitrite, Nitrate, Fluoride, Barium, Arsenic. The full list, with the level at the main supplier and the data source, is in the table above.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.