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Tap water quality report

Thor, IA

EPA monitoring detected 12 contaminants across the 1 water supplier serving Thor. 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.

1
water supplier
181
people served
12
contaminants found
Iowa rankings Lead in Iowa PFAS in Iowa

What was found in Thor'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
Fluoride
1000 µg/L 25%
of the EPA limit 4000 µg/L
Main supplier: THOR WATER WORKS · 181 people · 2012
1/1 SYR4
Copper
216 µg/L 17%
of the EPA limit 1300 µg/L
Main supplier: THOR WATER WORKS · 181 people · 2017
1/1 SYR4
Nitrate
103 µg/L 1%
of the EPA limit 10000 µg/L
Main supplier: THOR WATER WORKS · 181 people · 2019
1/1 SYR4
TTHM
7 µg/L 8.8%
of the EPA limit 80 µg/L
Main supplier: THOR WATER WORKS · 181 people · 2019
1/1 SYR4
Lead
4.7 µg/L 31%
of the EPA limit 15 µg/L
Main supplier: THOR WATER WORKS · 181 people · 2017
1/1 SYR4
Chloroform
3.58 µg/L
No EPA limit set
Main supplier: THOR WATER WORKS · 181 people · 2019
1/1 SYR4
Bromodichloromethane
2.25 µg/L
No EPA limit set
Main supplier: THOR WATER WORKS · 181 people · 2019
1/1 SYR4
Combined Radium (-226 And -228)
1.3 pCi/L 26%
of the EPA limit 5 pCi/L
Main supplier: THOR WATER WORKS · 181 people · 2014
1/1 SYR4
Dibromochloromethane
1.3 µg/L
No EPA limit set
Main supplier: THOR WATER WORKS · 181 people · 2019
1/1 SYR4
Dichloroacetic Acid
1 µg/L
No EPA limit set
Main supplier: THOR WATER WORKS · 181 people · 2019
1/1 SYR4
Trichloroacetic Acid
1 µg/L
No EPA limit set
Main supplier: THOR WATER WORKS · 181 people · 2019
1/1 SYR4
Lead
0.0080 mg/L 53%
of the EPA limit 0.0150 mg/L
Main supplier: THOR WATER WORKS · 181 people · 2023
1/1 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 Thor

SupplierPopulation served
THOR WATER WORKS 181

Frequently asked questions about Thor tap water

Is Thor tap water safe to drink?

EPA testing detected 12 contaminants in the water serving Thor. 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 Thor?

1 public water supplier report drinking-water monitoring for Thor, Iowa to the EPA. Each is listed above with its population served.

What contaminants are in Thor's water?

The contaminants EPA monitoring detected in Thor include Fluoride, Copper, Nitrate, TTHM, Lead. 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.