Late afternoon sun over Slim Lake, scattering a bright path across wind-textured water

LaGrange County Lake Quality

Indiana, 35 lakes, measured by IDEM

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. 12 of those lakes carry recent nutrient and algae readings. The county-level summary describes that subset, not every water body listed. For LaGrange County the spread behind the average matters more than the average itself: a few nutrient-rich lakes among many clear ones produce the same figure as the inverse.

The county's lakes lean shallow, which makes the readings sensitive to wind, sediment-resuspension, and any nutrient inputs from the watershed. The cleanest measured lake is Adams Lake.

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Quick Answers for LaGrange County

Cleanest lakes in LaGrange County →Cleanest lakes in Indiana →Best swimming lakes in Indiana →

Planning a trip? Check special fishing regulations for Adams Lake — or check the official Indiana fishing regulations.

All Lakes in LaGrange County

35 lakes · 12 ranked on readings, 23 without enough sampling12 lakes ranked on readings · 23 without enough sampling, hidden

Include not-rated lakes (23)

#	Lake	Clarity	Phosphorus	Algae	Trophic	Max Depth	Access
1	Adams LakeLaGrange	No recent samples	21 µg/L	2.7 µg/L	No recent samples	90.9 ft	✓ Public
2	Big Long LakeLaGrange	No recent samples	22 µg/L	4 µg/L	No recent samples	82 ft	Not recorded
3	Royer LakeLaGrange	No recent samples	43.5 µg/L	4 µg/L	No recent samples	49.9 ft	Not recorded
4	Eve LakeLaGrange	No recent samples	26 µg/L	2 µg/L	No recent samples	42 ft	Not recorded
5	Fish LakeLaGrange	No recent samples	26.5 µg/L	3.4 µg/L	No recent samples	75.1 ft	✓ Public
6	Martin LakeLaGrange	No recent samples	22 µg/L	3 µg/L	No recent samples	55.1 ft	Not recorded
7	Olin LakeLaGrange	No recent samples	12.5 µg/L	2 µg/L	No recent samples	No recent samples	Not recorded
8	Oliver LakeLaGrange	No recent samples	12.5 µg/L	3 µg/L	No recent samples	89.9 ft	✓ Public
9	Cedar LakeLaGrange	No recent samples	28.7 µg/L	2 µg/L	No recent samples	30.8 ft	Not recorded
10	Appleman LakeLaGrange	No recent samples	27 µg/L	7.7 µg/L	No recent samples	No recent samples	✓ Public
11	Lake of the WoodsLaGrange	No recent samples	39 µg/L	7 µg/L	No recent samples	No recent samples	Not recorded
12	Little Turkey LakeLaGrange	No recent samples	40.5 µg/L	13 µg/L	No recent samples	33.1 ft	✓ Public
	Dallas LakeLaGrange	No recent samples	No recent samples	No recent samples	No recent samples	32.2 ft	Not recorded
	Atwood LakeLaGrange	No recent samples	No recent samples	No recent samples	No recent samples	33.1 ft	✓ Public
	Witmer LakeLaGrange	No recent samples	No recent samples	No recent samples	No recent samples	54.1 ft	Not recorded
	Blackman LakeLaGrange	No recent samples	No recent samples	No recent samples	No recent samples	55.1 ft	Not recorded
	Nauvoo LakeLaGrange	No recent samples	123.5 µg/L	30.3 µg/L	No recent samples	40 ft	Not recorded
	Hackenburg LakeLaGrange	No recent samples	194.7 µg/L	10.2 µg/L	No recent samples	36.1 ft	Not recorded
	Messick LakeLaGrange	No recent samples	99.7 µg/L	10.2 µg/L	No recent samples	55.1 ft	✓ Public
	Cotton LakeLaGrange	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Brokesha LakeLaGrange	No recent samples	No recent samples	No recent samples	No recent samples	18 ft	Not recorded
	Stone LakeLaGrange	No recent samples	12 µg/L	1.5 µg/L	No recent samples	37.1 ft	Not recorded
	Cass LakeLaGrange	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	✓ Public
	South Twin LakeLaGrange	No recent samples	29.9 µg/L	4.1 µg/L	No recent samples	49.9 ft	Not recorded
	Pigeon LakeLaGrange	No recent samples	No recent samples	No recent samples	No recent samples	29.9 ft	Not recorded
	North Twin LakeLaGrange	No recent samples	19.6 µg/L	2.1 µg/L	No recent samples	38.1 ft	Not recorded
	Still LakeLaGrange	No recent samples	No recent samples	No recent samples	No recent samples	58.1 ft	Not recorded
	Troxel LakeLaGrange	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Ontario MillpondLaGrange	No recent samples	No recent samples	No recent samples	No recent samples	8.9 ft	✓ Public
	Nasby DamLaGrange	No recent samples	No recent samples	No recent samples	No recent samples	4.9 ft	✓ Public
	Mongo MillpondLaGrange	No recent samples	16.9 µg/L	1.6 µg/L	No recent samples	7.9 ft	✓ Public
	Grassy LakeLaGrange	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Wall LakeLaGrange	No recent samples	No recent samples	No recent samples	No recent samples	34.1 ft	Not recorded
	Green LakeLaGrange	No recent samples	14.5 µg/L	2.4 µg/L	No recent samples	26.9 ft	Not recorded
	Pretty LakeLaGrange	No recent samples	38.2 µg/L	3.6 µg/L	No recent samples	80.1 ft	✓ Public

NR = no nutrient or algae reading on record. The measurements are published as the authority reports them. Where the data comes from.

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Source: the Indiana Department of Environmental Management. See data sources.