Shawinigan, Quebec

Arsenic: 0 of 22 · Barium: 0 of 22 · Fluoride: 0 of 22 · Manganese: 6 of 22 · Uranium: 0 of 22 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

0 of 22 sampled wells (0%) had a latest result above the Quebec standard of 0.01 mg/L.

Median (latest per well): 0 mg/L
90th percentile: 0 mg/L
Highest: 0 mg/L
Undated: 21 well(s) have no usable sample date; their highest result is used.
Samples: 22, 1984-01-01 to 1984-01-01
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 22 sampled wells (0%) had a latest result above the Quebec standard of 1 mg/L.

Median (latest per well): 0.014 mg/L
90th percentile: 0.046 mg/L
Highest: 0.22 mg/L
Undated: 21 well(s) have no usable sample date; their highest result is used.
Samples: 22, 1984-01-01 to 1984-01-01
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

0 of 22 sampled wells (0%) had a latest result above the Quebec standard of 1.5 mg/L.

Median (latest per well): 0 mg/L
90th percentile: 0.4 mg/L
Highest: 0.7 mg/L
Undated: 21 well(s) have no usable sample date; their highest result is used.
Samples: 22, 1984-01-01 to 1984-01-01
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

6 of 22 sampled wells (27%) had a latest result above the Quebec standard of 0.12 mg/L.

Median (latest per well): 0.0118 mg/L
90th percentile: 0.22 mg/L
Highest: 0.82 mg/L
Undated: 21 well(s) have no usable sample date; their highest result is used.
Samples: 22, 1984-01-01 to 1984-01-01
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 22 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: 0.0031 mg/L
Undated: 21 well(s) have no usable sample date; their highest result is used.
Samples: 22, 1984-01-01 to 1984-01-01
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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If a result is high: arsenic · manganese · uranium · all guides