Preissac, Quebec

Arsenic: 0 of 10 · Barium: 0 of 10 · Fluoride: 1 of 10 · Manganese: 5 of 10 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 10 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: 0.0011 mg/L
Highest: 0.0059 mg/L
Samples: 10, 2006-08-16 to 2010-11-11
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 10 sampled wells (0%) had a latest result above the Quebec standard of 1 mg/L.

Median (latest per well): 0.0225 mg/L
90th percentile: 0.38 mg/L
Highest: 0.42 mg/L
Samples: 10, 2006-08-16 to 2010-11-11
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

1 of 10 sampled wells (10%) had a latest result above the Quebec standard of 1.5 mg/L.

Median (latest per well): 0.15 mg/L
90th percentile: 0.8 mg/L
Highest: 1.8 mg/L
Non-detects: 1 well(s) had a latest result of "not detected" with no detection limit reported; they are counted as below the standard.
Samples: 10, 2006-08-16 to 2010-11-11
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

5 of 10 sampled wells (50%) had a latest result above the Quebec standard of 0.12 mg/L.

Median (latest per well): 0.1185 mg/L
90th percentile: 0.32 mg/L
Highest: 1.4 mg/L
Samples: 10, 2006-08-16 to 2010-11-11
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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