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Tap water quality report

Hillsboro, ND

EPA monitoring detected 18 contaminants across the 2 water suppliers serving Hillsboro. 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
4,403
people served
18
contaminants found
North Dakota rankings Lead in North Dakota PFAS in North Dakota

What was found in Hillsboro'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
Copper
1050 µg/L 81%
of the EPA limit 1300 µg/L
Main supplier: EAST CENTRAL REGIONAL WD-TRAILL · 2,800 people · 2018
2/2 SYR4
Nitrate-Nitrite
560 µg/L 5.6%
of the EPA limit 10000 µg/L
Main supplier: EAST CENTRAL REGIONAL WD-TRAILL · 2,800 people · 2013
Highest in the city: 878 µg/L — HILLSBORO CITY OF · 1,603 people · 2019
2/2 SYR4
Fluoride
753 µg/L 19%
of the EPA limit 4000 µg/L
Highest in the city: HILLSBORO CITY OF · 1,603 people · 2017
1/2 SYR4
Nitrate
430 µg/L 4.3%
of the EPA limit 10000 µg/L
Highest in the city: HILLSBORO CITY OF · 1,603 people · 2014
1/2 SYR4
Lead
14.6 µg/L 97%
of the EPA limit 15 µg/L
Main supplier: EAST CENTRAL REGIONAL WD-TRAILL · 2,800 people · 2018
2/2 SYR4
TTHM
8.0225 µg/L 10%
of the EPA limit 80 µg/L
Main supplier: EAST CENTRAL REGIONAL WD-TRAILL · 2,800 people · 2019
2/2 SYR4
Arsenic
7.46 µg/L 75%
of the EPA limit 10 µg/L
Main supplier: EAST CENTRAL REGIONAL WD-TRAILL · 2,800 people · 2012
2/2 SYR4
Total Haloacetic Acids (HAA5)
5.46 µg/L 9.1%
of the EPA limit 60 µg/L
Main supplier: EAST CENTRAL REGIONAL WD-TRAILL · 2,800 people · 2019
2/2 SYR4
Chloroform
5.215 µg/L
No EPA limit set
Main supplier: EAST CENTRAL REGIONAL WD-TRAILL · 2,800 people · 2019
2/2 SYR4
Dichloroacetic Acid
4.43 µg/L
No EPA limit set
Main supplier: EAST CENTRAL REGIONAL WD-TRAILL · 2,800 people · 2019
2/2 SYR4
Barium
3.9 µg/L 0.2%
of the EPA limit 2000 µg/L
Highest in the city: HILLSBORO CITY OF · 1,603 people · 2017
1/2 SYR4
Combined Radium (-226 And -228)
1.95 pCi/L 39%
of the EPA limit 5 pCi/L
Highest in the city: HILLSBORO CITY OF · 1,603 people · 2017
1/2 SYR4
Bromodichloromethane
1.79 µg/L
No EPA limit set
Main supplier: EAST CENTRAL REGIONAL WD-TRAILL · 2,800 people · 2019
2/2 SYR4
Dibromochloromethane
1.425 µg/L
No EPA limit set
Main supplier: EAST CENTRAL REGIONAL WD-TRAILL · 2,800 people · 2019
2/2 SYR4
Gross Alpha, Excl. Radon And U
1.09 pCi/L 7.3%
of the EPA limit 15 pCi/L
Highest in the city: HILLSBORO CITY OF · 1,603 people · 2017
1/2 SYR4
Trichloroacetic Acid
1.03 µg/L
No EPA limit set
Main supplier: EAST CENTRAL REGIONAL WD-TRAILL · 2,800 people · 2019
1/2 SYR4
Combined Uranium
0.8500 µg/L 2.8%
of the EPA limit 30 µg/L
Highest in the city: HILLSBORO CITY OF · 1,603 people · 2017
1/2 SYR4
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: EAST CENTRAL REGIONAL WD-TRAILL · 2,800 people · 2024
Highest in the city: 0.0021 mg/L — HILLSBORO CITY OF · 1,603 people · 2025
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 Hillsboro

SupplierPopulation served
EAST CENTRAL REGIONAL WD-TRAILL 2,800
HILLSBORO CITY OF 1,603

Frequently asked questions about Hillsboro tap water

Is Hillsboro tap water safe to drink?

EPA testing detected 18 contaminants in the water serving Hillsboro. 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 Hillsboro?

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

What contaminants are in Hillsboro's water?

The contaminants EPA monitoring detected in Hillsboro include Copper, Nitrate-Nitrite, Fluoride, Nitrate, 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.