Gatineau, Quebec

Arsenic: 4 of 64 · Barium: 0 of 49 · Fluoride: 3 of 22 · Manganese: 51 of 136 · Uranium: 0 of 25 sampled wells above the Quebec standard. Updated 2026-10-17. Source : PACES – Projets d'acquisition de connaissances sur les eaux souterraines (MELCCFP), compiled database.

What wells in this municipality measured in the provincial PACES groundwater surveys. A local picture only: test your own well to know your water.

Arsenic

4 of 64 sampled wells (6%) had a latest result above the Quebec standard of 0.01 mg/L.

Median (latest per well): 0 mg/L
90th percentile: 0.003 mg/L
Highest: 0.1 mg/L
Samples: 107, 1991-04-12 to 2012-08-17
Source: PACES – Projets d'acquisition de connaissances sur les eaux souterraines (MELCCFP), compiled database (CC-BY 4.0), downloaded 2026-10-17
Standard: Règlement sur la qualité de l’eau potable, annexe 1

Barium

0 of 49 sampled wells (0%) had a latest result above the Quebec standard of 1 mg/L.

Median (latest per well): 0.075 mg/L
90th percentile: 0.26 mg/L
Highest: 0.71 mg/L
Samples: 57, 1995-06-13 to 2012-08-17
Source: PACES – Projets d'acquisition de connaissances sur les eaux souterraines (MELCCFP), compiled database (CC-BY 4.0), downloaded 2026-10-17
Standard: Règlement sur la qualité de l’eau potable, annexe 1

Fluoride

3 of 22 sampled wells (14%) had a latest result above the Quebec standard of 1.5 mg/L.

Median (latest per well): 0.395 mg/L
90th percentile: 1.5 mg/L
Highest: 1.9 mg/L
Samples: 25, 1991-04-12 to 2012-08-17
Source: PACES – Projets d'acquisition de connaissances sur les eaux souterraines (MELCCFP), compiled database (CC-BY 4.0), downloaded 2026-10-17
Standard: Règlement sur la qualité de l’eau potable, annexe 1

Manganese

51 of 136 sampled wells (38%) had a latest result above the Quebec standard of 0.12 mg/L.

Median (latest per well): 0.065 mg/L
90th percentile: 1.2 mg/L
Highest: 6.9 mg/L
Samples: 239, 1974-08-27 to 2012-08-17
Source: PACES – Projets d'acquisition de connaissances sur les eaux souterraines (MELCCFP), compiled database (CC-BY 4.0), downloaded 2026-10-17
Standard: Règlement sur la qualité de l’eau potable, annexe 1

Uranium

0 of 25 sampled wells (0%) had a latest result above the Quebec standard of 0.02 mg/L.

Median (latest per well): 0 mg/L
90th percentile: 0 mg/L
Highest: 0.0014 mg/L
Samples: 27, 1991-11-27 to 2012-08-17
Source: PACES – Projets d'acquisition de connaissances sur les eaux souterraines (MELCCFP), compiled database (CC-BY 4.0), downloaded 2026-10-17
Standard: Règlement sur la qualité de l’eau potable, annexe 1

Includes domestic, municipal and monitoring wells. Total and dissolved results both count. Non-detects count only when the lab's detection limit is at or below the standard. Method: data rules.

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