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Tap water quality report

Rolla, ND

EPA monitoring detected 24 contaminants across the 1 water supplier serving Rolla. 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
1,280
people served
24
contaminants found
North Dakota rankings Lead in North Dakota PFAS in North Dakota

What was found in Rolla'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
1354 µg/L 14%
of the EPA limit 10000 µg/L
Main supplier: ROLLA CITY OF · 1,280 people · 2019
1/1 SYR4
Nitrate
1210 µg/L 12%
of the EPA limit 10000 µg/L
Main supplier: ROLLA CITY OF · 1,280 people · 2017
1/1 SYR4
Fluoride
784 µg/L 20%
of the EPA limit 4000 µg/L
Main supplier: ROLLA CITY OF · 1,280 people · 2017
1/1 SYR4
Copper
351.5 µg/L 27%
of the EPA limit 1300 µg/L
Main supplier: ROLLA CITY OF · 1,280 people · 2017
1/1 SYR4
TTHM
74.236 µg/L 93%
of the EPA limit 80 µg/L
Main supplier: ROLLA CITY OF · 1,280 people · 2019
1/1 SYR4
Barium
67.3 µg/L 3.4%
of the EPA limit 2000 µg/L
Main supplier: ROLLA CITY OF · 1,280 people · 2017
1/1 SYR4
Dibromochloromethane
26.784 µg/L
No EPA limit set
Main supplier: ROLLA CITY OF · 1,280 people · 2019
1/1 SYR4
Bromodichloromethane
25.454 µg/L
No EPA limit set
Main supplier: ROLLA CITY OF · 1,280 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
17.689 µg/L 29%
of the EPA limit 60 µg/L
Main supplier: ROLLA CITY OF · 1,280 people · 2019
1/1 SYR4
Chloroform
16.69 µg/L
No EPA limit set
Main supplier: ROLLA CITY OF · 1,280 people · 2019
1/1 SYR4
Bromoform
10.258 µg/L
No EPA limit set
Main supplier: ROLLA CITY OF · 1,280 people · 2019
1/1 SYR4
Dibromoacetic Acid
9.156 µg/L
No EPA limit set
Main supplier: ROLLA CITY OF · 1,280 people · 2019
1/1 SYR4
Lead
8.4575 µg/L 56%
of the EPA limit 15 µg/L
Main supplier: ROLLA CITY OF · 1,280 people · 2017
1/1 SYR4
Combined Uranium
8.2 µg/L 27%
of the EPA limit 30 µg/L
Main supplier: ROLLA CITY OF · 1,280 people · 2017
1/1 SYR4
Dichloroacetic Acid
6.116 µg/L
No EPA limit set
Main supplier: ROLLA CITY OF · 1,280 people · 2019
1/1 SYR4
Trichloroacetic Acid
5.1385 µg/L
No EPA limit set
Main supplier: ROLLA CITY OF · 1,280 people · 2019
1/1 SYR4
Monochloroacetic Acid
2.65 µg/L
No EPA limit set
Main supplier: ROLLA CITY OF · 1,280 people · 2019
1/1 SYR4
Gross Alpha, Excl. Radon And U
2.62 pCi/L 17%
of the EPA limit 15 pCi/L
Main supplier: ROLLA CITY OF · 1,280 people · 2017
1/1 SYR4
Arsenic
1.81 µg/L 18%
of the EPA limit 10 µg/L
Main supplier: ROLLA CITY OF · 1,280 people · 2016
1/1 SYR4
Selenium
1.47 µg/L 2.9%
of the EPA limit 50 µg/L
Main supplier: ROLLA CITY OF · 1,280 people · 2017
1/1 SYR4
1,1,1-Trichloroethane
1.184 µg/L 0.6%
of the EPA limit 200 µg/L
Main supplier: ROLLA CITY OF · 1,280 people · 2019
1/1 SYR4
Monobromoacetic Acid
1.18 µg/L
No EPA limit set
Main supplier: ROLLA CITY OF · 1,280 people · 2019
1/1 SYR4
Combined Radium (-226 And -228)
0.4800 pCi/L 9.6%
of the EPA limit 5 pCi/L
Main supplier: ROLLA CITY OF · 1,280 people · 2017
1/1 SYR4
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: ROLLA CITY OF · 1,280 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 Rolla

SupplierPopulation served
ROLLA CITY OF 1,280

Frequently asked questions about Rolla tap water

Is Rolla tap water safe to drink?

EPA testing detected 24 contaminants in the water serving Rolla. 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 Rolla?

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

What contaminants are in Rolla's water?

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