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Tap water quality report

Garrison, ND

EPA monitoring detected 18 contaminants across the 2 water suppliers serving Garrison. 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
3,258
people served
18
contaminants found
North Dakota rankings Lead in North Dakota PFAS in North Dakota

What was found in Garrison'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
560 µg/L 14%
of the EPA limit 4000 µg/L
Highest in the city: GARRISON CITY OF · 1,453 people · 2016
1/2 SYR4
Nitrate-Nitrite
100 µg/L 1%
of the EPA limit 10000 µg/L
Highest in the city: GARRISON CITY OF · 1,453 people · 2019
1/2 SYR4
Copper
89.55 µg/L 6.9%
of the EPA limit 1300 µg/L
Main supplier: GARRISON RURAL WATER DISTRICT · 1,805 people · 2019
2/2 SYR4
TTHM
74.14 µg/L 93%
of the EPA limit 80 µg/L
Main supplier: GARRISON RURAL WATER DISTRICT · 1,805 people · 2019
2/2 SYR4
Chloroform
54.674 µg/L
No EPA limit set
Main supplier: GARRISON RURAL WATER DISTRICT · 1,805 people · 2019
2/2 SYR4
Total Haloacetic Acids (HAA5)
31.148 µg/L 52%
of the EPA limit 60 µg/L
Main supplier: GARRISON RURAL WATER DISTRICT · 1,805 people · 2019
2/2 SYR4
Lead
10.453 µg/L 70%
of the EPA limit 15 µg/L
Main supplier: GARRISON RURAL WATER DISTRICT · 1,805 people · 2019
Highest in the city: 21.22 µg/L — GARRISON CITY OF · 1,453 people · 2019
2/2 SYR4
Dichloroacetic Acid
21.185 µg/L
No EPA limit set
Main supplier: GARRISON RURAL WATER DISTRICT · 1,805 people · 2019
2/2 SYR4
Bromodichloromethane
15.95 µg/L
No EPA limit set
Main supplier: GARRISON RURAL WATER DISTRICT · 1,805 people · 2019
2/2 SYR4
Trichloroacetic Acid
9.684 µg/L
No EPA limit set
Main supplier: GARRISON RURAL WATER DISTRICT · 1,805 people · 2019
Highest in the city: 11.6 µg/L — GARRISON CITY OF · 1,453 people · 2019
2/2 SYR4
Barium
9.61 µg/L 0.5%
of the EPA limit 2000 µg/L
Highest in the city: GARRISON CITY OF · 1,453 people · 2016
1/2 SYR4
Dibromochloromethane
5.656 µg/L
No EPA limit set
Main supplier: GARRISON RURAL WATER DISTRICT · 1,805 people · 2019
Highest in the city: 5.756 µg/L — GARRISON CITY OF · 1,453 people · 2019
2/2 SYR4
Monochloroacetic Acid
3.566 µg/L
No EPA limit set
Main supplier: GARRISON RURAL WATER DISTRICT · 1,805 people · 2019
2/2 SYR4
Dibromoacetic Acid
2.067 µg/L
No EPA limit set
Main supplier: GARRISON RURAL WATER DISTRICT · 1,805 people · 2019
2/2 SYR4
Gross Alpha, Excl. Radon And U
1.48 pCi/L 9.9%
of the EPA limit 15 pCi/L
Highest in the city: GARRISON CITY OF · 1,453 people · 2018
1/2 SYR4
Combined Radium (-226 And -228)
0.9980 pCi/L 20%
of the EPA limit 5 pCi/L
Highest in the city: GARRISON CITY OF · 1,453 people · 2018
1/2 SYR4
Bromoform
0.5100 µg/L
No EPA limit set
Main supplier: GARRISON RURAL WATER DISTRICT · 1,805 people · 2019
1/2 SYR4
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: GARRISON RURAL WATER DISTRICT · 1,805 people · 2025
Highest in the city: 0.0021 mg/L — GARRISON CITY OF · 1,453 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 Garrison

SupplierPopulation served
GARRISON RURAL WATER DISTRICT 1,805
GARRISON CITY OF 1,453

Frequently asked questions about Garrison tap water

Is Garrison tap water safe to drink?

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

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

What contaminants are in Garrison's water?

The contaminants EPA monitoring detected in Garrison include Fluoride, Nitrate-Nitrite, Copper, TTHM, Chloroform. 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.