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Tap water quality report

Grand Portage

EPA monitoring tested this supplier for 73 contaminants and detected 13. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

73
contaminants tested
13
detected
820
people served
71
health-based violations
Minnesota rankingsLead in MinnesotaPFAS in Minnesota
Water source
Surface water
Ownership
Native American

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

71
health-based violations
2,011
violations on file
2
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2024-02-24
TT Health-based Resolved 2024-02-24
TT Health-based Resolved 2024-02-24
TT Health-based Resolved 2024-02-24
TT Health-based Unaddressed 2024-02-24
TT Health-based Unaddressed 2024-02-24
TT Health-based Resolved 2024-02-24
TT Health-based Resolved 2024-02-24
TT Health-based Resolved 2024-02-24
TT Health-based Resolved 2024-02-24

Other contaminants detected

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 this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Copper
195.45 µg/L 15%
of the EPA limit 1300 µg/L
worst single sample: 278 µg/L
50/50 SYR4 2014–2019
Lead
36.09 µg/L 241%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 202 µg/L
28/50 SYR4 2014–2019
TTHM
24.8 µg/L 31%
of the EPA limit 80 µg/L
 19/19 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
17.19 µg/L 29%
of the EPA limit 60 µg/L
worst single sample: 18 µg/L
19/19 SYR4 2012–2019
Lead
0.0285 mg/L 190%
above the EPA limit of 0.0150 mg/L
 16/16 LCR 2025
Nitrate
430 µg/L 4.3%
of the EPA limit 10000 µg/L
 10/16 SYR4 2012–2019
Barium
10.325 µg/L 0.5%
of the EPA limit 2000 µg/L
worst single sample: 10.5 µg/L
6/7 SYR4 2012–2019
Nitrate-Nitrite
422.5 µg/L 4.2%
of the EPA limit 10000 µg/L
worst single sample: 430 µg/L
6/8 SYR4 2012–2019
Combined Radium (-226 And -228)
1.0685 pCi/L 21%
of the EPA limit 5 pCi/L
worst single sample: 1.11 pCi/L
2/2 SYR4 2016–2019
Fluoride
97.5 µg/L 2.4%
of the EPA limit 4000 µg/L
worst single sample: 100 µg/L
2/9 SYR4 2012–2019
Gross Alpha, Excl. Radon And U
1.4773 pCi/L 9.8%
of the EPA limit 15 pCi/L
worst single sample: 1.55 pCi/L
2/3 SYR4 2016–2019
Antimony, Total
0.0400 µg/L 0.7%
of the EPA limit 6 µg/L
 1/7 SYR4 2012–2019
Arsenic
0.5700 µg/L 5.7%
of the EPA limit 10 µg/L
 1/6 SYR4 2013–2019
60 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,3,7,8-TCDD2,4,5-TP2,4-DAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
COOK, VALLEN
Phone
218-475-2020
Email
[email protected]

Frequently asked questions about Grand Portage

Is Grand Portage tap water safe to drink?

EPA monitoring detected 13 contaminants in Grand Portage's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Grand Portage's water?

EPA monitoring detected Copper, Lead, TTHM, Total Haloacetic Acids (HAA5), Lead, and others. The full list with the level and data source for each is above.

How many people does Grand Portage serve?

Grand Portage reports serving 820 people in Minnesota, per its EPA record.

Has Grand Portage had any water quality violations?

The EPA has 2011 violations on file for Grand Portage, of which 71 are health-based (a contaminant limit or required treatment was breached) and 2 remain open. The rest are monitoring or reporting failures.

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.