Argenteuil County Lake Quality
Québec, 48 lakes, average grade B (Good)
Argenteuil County's 48 graded lakes fall in the moderate-density bracket for Québec. The county-level average smooths over real differences — a single agricultural watershed near the southwest corner can pull the average down even if the rest of the county runs clean. The county-wide average lands at B — solid water quality with most lakes carrying clear summer transparency and low-to-moderate phosphorus.
Most of the county's monitored lakes are shallow — under 50 feet — which means wind keeps the water column mixed all summer and sediment-bound phosphorus releases back into the surface layer whenever the bottom is disturbed. Lac Black (A) is the cleanest in the county.
Quick Answers for Argenteuil County
Planning a trip? Check special fishing regulations for Lac Black — or check the official Québec fishing regulations.
All Lakes in Argenteuil County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Lac Black | A | 15.1 ft | 5.9 µg/L |
| 2 | Lac Boyd | A | 17.1 ft | 6.2 µg/L |
| 3 | Lac Clair | A | 20.3 ft | 5.3 µg/L |
| 4 | Lac Curran | A | 17.1 ft | 5.7 µg/L |
| 5 | Lac Louisa | A | 19.7 ft | 3.4 µg/L |
| 6 | Lac ÉCho | A | 15.1 ft | 5.3 µg/L |
| 7 | Lac Green | A | 15.7 ft | 3.9 µg/L |
| 8 | Lac Spectacles | A | 15.7 ft | 5.9 µg/L |
| 9 | Lac des Esclaves | A | 17.4 ft | 4.9 µg/L |
| 10 | Lac Craig | A | - | 5.3 µg/L |
| 11 | Lac Reardon | A | 20.2 ft | 7.3 µg/L |
| 12 | Lac Crooks | A | 10.5 ft | 12.2 µg/L |
| 13 | Lac Barron | A | 12.5 ft | 5.4 µg/L |
| 14 | Grand Lac Macdonald | A | 14.1 ft | 5 µg/L |
| 15 | Lac Sir-John | A | 13.5 ft | 5.2 µg/L |
| 16 | Petit Lac Macdonald | A | 13.8 ft | 4.9 µg/L |
| 17 | Lac Rainbow | A | 11.2 ft | 6.5 µg/L |
| 18 | Petit Lac Rainbow | A | 10.2 ft | 6.9 µg/L |
| 19 | Lac Kenny | A | 13 ft | 5.3 µg/L |
| 20 | Lac Hughes | A | 14.4 ft | 6.3 µg/L |
| 21 | Lac Harrington | A | 14.4 ft | 3.9 µg/L |
| 22 | Lac Solar | A | 11.2 ft | 5.9 µg/L |
| 23 | Lac Caroline | A | 11.2 ft | 7.2 µg/L |
| 24 | Lac AgnèS | A | 11.5 ft | 11.1 µg/L |
| 25 | Lac Williams | A | 11.8 ft | 10.5 µg/L |
| 26 | Lac Bixley | B | 7.9 ft | 7.1 µg/L |
| 27 | Lac Paul | B | 8.9 ft | 11.1 µg/L |
| 28 | Lac Chevreuil | B | 6.7 ft | 10.5 µg/L |
| 29 | Lac No Man | B | 8.9 ft | 7.7 µg/L |
| 30 | Lac Renoir | B | 9.4 ft | 9.6 µg/L |
| 31 | Lac Rond | B | 8 ft | 7.9 µg/L |
| 32 | Lac Monaco | B | 7.2 ft | 9.7 µg/L |
| 33 | Lac Carillon | B | 7.7 ft | 8.9 µg/L |
| 34 | Lac Tamaracouta | B | 9.5 ft | 8.2 µg/L |
| 35 | Lac Mcdougall | B | 8.2 ft | 8.7 µg/L |
| 36 | Lac Rainbow D'En Haut | B | 9.4 ft | 10.4 µg/L |
| 37 | Lac Dainava | B | 5.2 ft | 13.2 µg/L |
| 38 | Lac Indien | B | 7.1 ft | 10.7 µg/L |
| 39 | Lac Ray | B | 6.7 ft | 16.2 µg/L |
| 40 | Lac de la Montagne | B | 7.2 ft | 14.6 µg/L |
| 41 | Lac Evans | B | 7.4 ft | 9.5 µg/L |
| 42 | Lac Ivan | B | 6.6 ft | 15.1 µg/L |
| 43 | Lac Clark | B | 5.2 ft | 11.9 µg/L |
| 44 | Lac En Croissant | B | 5.6 ft | 12.6 µg/L |
| 45 | Lac Fish | B | 4.9 ft | 15.6 µg/L |
| 46 | Lac Graham | B | 4.6 ft | 17.2 µg/L |
| 47 | Lac Frederic | C | 5.6 ft | 19.7 µg/L |
| 48 | Lac Clovis | C | 4.9 ft | 20.2 µg/L |
Other Counties in Québec
See how Argenteuil County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 38 states.
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Source: EPA National Aquatic Resource Surveys, 2026.