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LakeQuality

Cleaner Lakes Than North Long Lake

5 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.

North Long Lake carries a Grade F (Very Poor) water quality score. Within 30 miles, 5 lakes hold a higher grade. Johanna Lake (Ramsey County, Grade C, 3.2 mi away) is the closest meaningful upgrade.

1
C

Johanna Lake

Ramsey County, Minnesota · 3.2 mi from North Long Lake
  • +Two grade letters higher (F → C)
  • ++4.7 ft water clarity
  • +Lower phosphorus (38 vs 102 µg/L)
2
C

South Long Lake

Ramsey County, Minnesota · 0.8 mi from North Long Lake
  • +Two grade letters higher (F → C)
  • ++1.8 ft water clarity
  • +Lower phosphorus (45 vs 102 µg/L)
3
C

Spring Lake

Ramsey County, Minnesota · 2 mi from North Long Lake
  • +Two grade letters higher (F → C)
  • ++1.1 ft water clarity
  • +Lower phosphorus (58 vs 102 µg/L)
4
C

Moore Lake

Anoka County, Minnesota · 2 mi from North Long Lake
  • +Two grade letters higher (F → C)
  • ++1.4 ft water clarity
  • +Lower phosphorus (39 vs 102 µg/L)
5
D

Silver Lake

Ramsey County, Minnesota · 2.8 mi from North Long Lake
  • +Higher grade (F → D)
  • ++1.5 ft water clarity
  • +Lower phosphorus (77.5 vs 102 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.

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