L'Ange-Gardien, Quebec

Arsenic: 1 of 13 · Barium: 0 of 13 · Fluoride: 1 of 18 · Manganese: 3 of 18 · Uranium: 0 of 12 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

1 of 13 sampled wells (8%) 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: 0.018 mg/L
Non-detects: 4 well(s) had a latest result of "not detected" with no detection limit reported; they are counted as below the standard.
Samples: 13, 2005-07-27 to 2012-08-14
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 13 sampled wells (0%) had a latest result above the Quebec standard of 1 mg/L.

Median (latest per well): 0.021 mg/L
90th percentile: 0.065 mg/L
Highest: 0.17 mg/L
Non-detects: 2 well(s) had a latest result of "not detected" with no detection limit reported; they are counted as below the standard.
Samples: 14, 2005-07-27 to 2012-08-14
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 18 sampled wells (6%) had a latest result above the Quebec standard of 1.5 mg/L.

Median (latest per well): 0.285 mg/L
90th percentile: 1.3 mg/L
Highest: 2.2 mg/L
Samples: 20, 1995-07-05 to 2012-08-14
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

3 of 18 sampled wells (17%) had a latest result above the Quebec standard of 0.12 mg/L.

Median (latest per well): 0.0095 mg/L
90th percentile: 0.21 mg/L
Highest: 2.07 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: 21, 1995-07-05 to 2012-08-14
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 12 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: 0.0019 mg/L
Non-detects: 4 well(s) had a latest result of "not detected" with no detection limit reported; they are counted as below the standard.
Samples: 13, 2005-07-27 to 2012-08-14
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.

Find an accredited lab in Quebec →

If a result is high: arsenic · manganese · uranium · all guides