1
BBlooms Lake
Chisago County, Minnesota · 2.4 mi from Swamp Lake
- +Two grade letters higher (D → B)
- ++5.3 ft water clarity
- +Lower phosphorus (19 vs 41 µg/L)
Cleaner Lakes Than Swamp Lake
5 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Swamp Lake carries a Grade D (Poor) water quality score. Within 30 miles, 5 lakes hold a higher grade. Blooms Lake (Chisago County, Grade B, 2.4 mi away) is the closest meaningful upgrade.
2
BSpider Lake
Chisago County, Minnesota · 1.6 mi from Swamp Lake
- +Two grade letters higher (D → B)
- ++4.9 ft water clarity
- +Lower phosphorus (23.5 vs 41 µg/L)
3
CKroon Lake
Chisago County, Minnesota · 2.3 mi from Swamp Lake
- +Higher grade (D → C)
- ++4.3 ft water clarity
- +Lower phosphorus (23 vs 41 µg/L)
4
CSouth Center Lake
Chisago County, Minnesota · 2.6 mi from Swamp Lake
- +Higher grade (D → C)
- ++3.3 ft water clarity
- +Lower phosphorus (29 vs 41 µg/L)
5
CChisago Lake
Chisago County, Minnesota · 3.5 mi from Swamp Lake
- +Higher grade (D → C)
- ++2.4 ft water clarity
- +Lower phosphorus (32 vs 41 µg/L)
How this list is built
Every lake on LakeQuality has a calculated grade from EPA Water Quality Portal samples — secchi depth, total phosphorus, and chlorophyll-a measured against Metropolitan Council thresholds. To suggest cleaner alternatives, we filter lakes within 30 miles to those with a strictly higher numeric score, then rank by grade improvement with a small proximity tiebreak. Cross-state and limited-data lakes are excluded so the list stays locally relevant.