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Tap water quality report

Grand Portage, MN

EPA monitoring detected 13 contaminants across the 1 water supplier serving Grand Portage. 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
820
people served
13
contaminants found
Minnesota rankings Lead in Minnesota PFAS in Minnesota

What was found in Grand Portage'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
430 µg/L 4.3%
of the EPA limit 10000 µg/L
Main supplier: GRAND PORTAGE · 820 people · 2019
1/1 SYR4
Nitrate-Nitrite
422.5 µg/L 4.2%
of the EPA limit 10000 µg/L
Main supplier: GRAND PORTAGE · 820 people · 2019
1/1 SYR4
Copper
195.45 µg/L 15%
of the EPA limit 1300 µg/L
Main supplier: GRAND PORTAGE · 820 people · 2019
1/1 SYR4
Fluoride
97.5 µg/L 2.4%
of the EPA limit 4000 µg/L
Main supplier: GRAND PORTAGE · 820 people · 2019
1/1 SYR4
Lead
36.09 µg/L 241%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
Main supplier: GRAND PORTAGE · 820 people · 2019
1/1 SYR4
TTHM
24.8 µg/L 31%
of the EPA limit 80 µg/L
Main supplier: GRAND PORTAGE · 820 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
17.19 µg/L 29%
of the EPA limit 60 µg/L
Main supplier: GRAND PORTAGE · 820 people · 2019
1/1 SYR4
Barium
10.325 µg/L 0.5%
of the EPA limit 2000 µg/L
Main supplier: GRAND PORTAGE · 820 people · 2019
1/1 SYR4
Gross Alpha, Excl. Radon And U
1.4773 pCi/L 9.8%
of the EPA limit 15 pCi/L
Main supplier: GRAND PORTAGE · 820 people · 2019
1/1 SYR4
Combined Radium (-226 And -228)
1.0685 pCi/L 21%
of the EPA limit 5 pCi/L
Main supplier: GRAND PORTAGE · 820 people · 2019
1/1 SYR4
Arsenic
0.5700 µg/L 5.7%
of the EPA limit 10 µg/L
Main supplier: GRAND PORTAGE · 820 people · 2019
1/1 SYR4
Antimony, Total
0.0400 µg/L 0.7%
of the EPA limit 6 µg/L
Main supplier: GRAND PORTAGE · 820 people · 2019
1/1 SYR4
Lead
0.0285 mg/L 190%
above the EPA limit of 0.0150 mg/L
Main supplier: GRAND PORTAGE · 820 people · 2025
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 Grand Portage

SupplierPopulation served
GRAND PORTAGE 820

Frequently asked questions about Grand Portage tap water

Is Grand Portage tap water safe to drink?

EPA testing detected 13 contaminants in the water serving Grand Portage. 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 Grand Portage?

1 public water supplier report drinking-water monitoring for Grand Portage, Minnesota to the EPA. Each is listed above with its population served.

What contaminants are in Grand Portage's water?

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