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Tap water quality report

Fairfield, IA

EPA monitoring detected 17 contaminants across the 3 water suppliers serving Fairfield. 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.

3
water suppliers
10,429
people served
17
contaminants found
Iowa rankings Lead in Iowa PFAS in Iowa

What was found in Fairfield'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
1100 µg/L 28%
of the EPA limit 4000 µg/L
Main supplier: FAIRFIELD WATER SUPPLY · 9,821 people · 2018
1/3 SYR4
Copper
47 µg/L 3.6%
of the EPA limit 1300 µg/L
Main supplier: FAIRFIELD WATER SUPPLY · 9,821 people · 2019
Highest in the city: 305 µg/L — JEFFERSON COUNTY RURAL WATER DISTRICT · 468 people · 2018
2/3 SYR4
Nitrate
260 µg/L 2.6%
of the EPA limit 10000 µg/L
Main supplier: FAIRFIELD WATER SUPPLY · 9,821 people · 2019
1/3 SYR4
Lithium
199 µg/L
No EPA limit set
Main supplier: FAIRFIELD WATER SUPPLY · 9,821 people · 2023
1/3 UCMR-5
TTHM
14 µg/L 18%
of the EPA limit 80 µg/L
Main supplier: FAIRFIELD WATER SUPPLY · 9,821 people · 2019
Highest in the city: 60.97 µg/L — JEFFERSON COUNTY RURAL WATER DISTRICT · 468 people · 2019
2/3 SYR4
Chloroform
0.6000 µg/L
No EPA limit set
Main supplier: FAIRFIELD WATER SUPPLY · 9,821 people · 2019
Highest in the city: 55 µg/L — JEFFERSON COUNTY RURAL WATER DISTRICT · 468 people · 2019
2/3 SYR4
Total Haloacetic Acids (HAA5)
34 µg/L 57%
of the EPA limit 60 µg/L
Highest in the city: JEFFERSON COUNTY RURAL WATER DISTRICT · 468 people · 2019
1/3 SYR4
Dichloroacetic Acid
21 µg/L
No EPA limit set
Highest in the city: JEFFERSON COUNTY RURAL WATER DISTRICT · 468 people · 2019
1/3 SYR4
Trichloroacetic Acid
12 µg/L
No EPA limit set
Highest in the city: JEFFERSON COUNTY RURAL WATER DISTRICT · 468 people · 2019
1/3 SYR4
Lead
8.4 µg/L 56%
of the EPA limit 15 µg/L
Main supplier: FAIRFIELD WATER SUPPLY · 9,821 people · 2019
Highest in the city: 10.3 µg/L — JEFFERSON COUNTY RURAL WATER DISTRICT · 468 people · 2018
2/3 SYR4
Bromoform
8 µg/L
No EPA limit set
Main supplier: FAIRFIELD WATER SUPPLY · 9,821 people · 2019
2/3 SYR4
Bromodichloromethane
1.4 µg/L
No EPA limit set
Main supplier: FAIRFIELD WATER SUPPLY · 9,821 people · 2019
Highest in the city: 7.6 µg/L — JEFFERSON COUNTY RURAL WATER DISTRICT · 468 people · 2019
2/3 SYR4
Dibromochloromethane
3.9 µg/L
No EPA limit set
Main supplier: FAIRFIELD WATER SUPPLY · 9,821 people · 2019
2/3 SYR4
Combined Radium (-226 And -228)
3.72 pCi/L 74%
of the EPA limit 5 pCi/L
Main supplier: FAIRFIELD WATER SUPPLY · 9,821 people · 2019
1/3 SYR4
Monochloroacetic Acid
3 µg/L
No EPA limit set
Main supplier: FAIRFIELD WATER SUPPLY · 9,821 people · 2019
2/3 SYR4
Dibromoacetic Acid
2 µg/L
No EPA limit set
Main supplier: FAIRFIELD WATER SUPPLY · 9,821 people · 2019
1/3 SYR4
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: FAIRFIELD WATER SUPPLY · 9,821 people · 2025
3/3 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 Fairfield

SupplierPopulation served
FAIRFIELD WATER SUPPLY 9,821
JEFFERSON COUNTY RURAL WATER DISTRICT 468
FAIRFIELD ESTATES MOBILE HOME PARK 140

Frequently asked questions about Fairfield tap water

Is Fairfield tap water safe to drink?

EPA testing detected 17 contaminants in the water serving Fairfield. 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 Fairfield?

3 public water suppliers report drinking-water monitoring for Fairfield, Iowa to the EPA. Each is listed above with its population served.

What contaminants are in Fairfield's water?

The contaminants EPA monitoring detected in Fairfield include Fluoride, Copper, Nitrate, Lithium, TTHM. 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.