Rouyn-Noranda, Quebec

Arsenic: 3 of 26 · Barium: 0 of 27 · Fluoride: 0 of 27 · Manganese: 12 of 26 · Uranium: 0 of 23 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

3 of 26 sampled wells (12%) had a latest result above the Quebec standard of 0.01 mg/L.

Median (latest per well): 0.0012 mg/L
90th percentile: 0.0068 mg/L
Highest: 0.02 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: 26, 1981-11-22 to 2014-08-13
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 27 sampled wells (0%) had a latest result above the Quebec standard of 1 mg/L.

Median (latest per well): 0.011 mg/L
90th percentile: 0.049 mg/L
Highest: 0.11 mg/L
Samples: 27, 1990-08-22 to 2014-08-13
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 27 sampled wells (0%) had a latest result above the Quebec standard of 1.5 mg/L.

Median (latest per well): 0.05 mg/L
90th percentile: 0.2 mg/L
Highest: 0.3 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: 27, 1990-08-22 to 2014-08-13
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

12 of 26 sampled wells (46%) had a latest result above the Quebec standard of 0.12 mg/L.

Median (latest per well): 0.0925 mg/L
90th percentile: 0.52 mg/L
Highest: 8.8 mg/L
Samples: 26, 1990-10-22 to 2014-08-13
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 23 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: 0.0016 mg/L
Highest: 0.0031 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: 23, 2010-07-29 to 2014-08-13
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