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Tap water quality report

Tioga, ND

EPA monitoring detected 17 contaminants across the 2 water suppliers serving Tioga. 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
3,205
people served
17
contaminants found
North Dakota rankings Lead in North Dakota PFAS in North Dakota

What was found in Tioga'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
39.3 µg/L 3%
of the EPA limit 1300 µg/L
Main supplier: TIOGA CITY OF · 2,202 people · 2017
Highest in the city: 854.3 µg/L — R & T WATER SYSTEM · 1,003 people · 2018
2/2 SYR4
Fluoride
710 µg/L 18%
of the EPA limit 4000 µg/L
Highest in the city: R & T WATER SYSTEM · 1,003 people · 2016
1/2 SYR4
Nitrate-Nitrite
320 µg/L 3.2%
of the EPA limit 10000 µg/L
Highest in the city: R & T WATER SYSTEM · 1,003 people · 2019
1/2 SYR4
Lead
1.23 µg/L 8.2%
of the EPA limit 15 µg/L
Main supplier: TIOGA CITY OF · 2,202 people · 2017
Highest in the city: 37.6625 µg/L — R & T WATER SYSTEM · 1,003 people · 2018
2/2 SYR4
TTHM
18.304 µg/L 23%
of the EPA limit 80 µg/L
Main supplier: TIOGA CITY OF · 2,202 people · 2019
2/2 SYR4
Total Haloacetic Acids (HAA5)
12.568 µg/L 21%
of the EPA limit 60 µg/L
Main supplier: TIOGA CITY OF · 2,202 people · 2019
2/2 SYR4
Chloroform
12.2425 µg/L
No EPA limit set
Main supplier: TIOGA CITY OF · 2,202 people · 2019
2/2 SYR4
Dichloroacetic Acid
10.18 µg/L
No EPA limit set
Main supplier: TIOGA CITY OF · 2,202 people · 2019
2/2 SYR4
Bromodichloromethane
4.769 µg/L
No EPA limit set
Main supplier: TIOGA CITY OF · 2,202 people · 2019
2/2 SYR4
Barium
3.74 µg/L 0.2%
of the EPA limit 2000 µg/L
Highest in the city: R & T WATER SYSTEM · 1,003 people · 2016
1/2 SYR4
Monochloroacetic Acid
2.69 µg/L
No EPA limit set
Main supplier: TIOGA CITY OF · 2,202 people · 2019
1/2 SYR4
Dibromochloromethane
1.676 µg/L
No EPA limit set
Main supplier: TIOGA CITY OF · 2,202 people · 2019
Highest in the city: 2.0725 µg/L — R & T WATER SYSTEM · 1,003 people · 2019
2/2 SYR4
Trichloroacetic Acid
1.682 µg/L
No EPA limit set
Main supplier: TIOGA CITY OF · 2,202 people · 2019
Highest in the city: 1.967 µg/L — R & T WATER SYSTEM · 1,003 people · 2019
2/2 SYR4
Arsenic
1.31 µg/L 13%
of the EPA limit 10 µg/L
Highest in the city: R & T WATER SYSTEM · 1,003 people · 2016
1/2 SYR4
Combined Radium (-226 And -228)
1.21 pCi/L 24%
of the EPA limit 5 pCi/L
Highest in the city: R & T WATER SYSTEM · 1,003 people · 2017
1/2 SYR4
Combined Uranium
0.4700 µg/L 1.6%
of the EPA limit 30 µg/L
Highest in the city: R & T WATER SYSTEM · 1,003 people · 2017
1/2 SYR4
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: TIOGA CITY OF · 2,202 people · 2023
Highest in the city: 0.0017 mg/L — R & T WATER SYSTEM · 1,003 people · 2024
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 Tioga

SupplierPopulation served
TIOGA CITY OF 2,202
R & T WATER SYSTEM 1,003

Frequently asked questions about Tioga tap water

Is Tioga tap water safe to drink?

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

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

What contaminants are in Tioga's water?

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