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

Rockingham County Lake Quality

New Hampshire, 79 lakes, measured by NHDES

Rockingham County has 79 monitored lakes, enough that within-county variation matters as much as the county average. Some are deep glacial basins, others are shallow agricultural-watershed waters, and the measurements reflect that mix. 41 of those lakes carry recent nutrient and algae readings. The county-level summary describes that subset, not every water body listed. The county's readings sit in the middle of the New Hampshire range, with one or two lakes pulling the average up or down depending on year.

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 Great Pond-North.

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Quick Answers for Rockingham County

Cleanest lakes in Rockingham County →Best swimming lakes in New Hampshire →

Planning a trip? Check special fishing regulations for Great Pond-North — or check the official New Hampshire fishing regulations.

All Lakes in Rockingham County

79 lakes · 41 ranked on readings, 38 without enough sampling41 lakes ranked on readings · 38 without enough sampling, hidden

Include not-rated lakes (38)

#	Lake	Clarity	Phosphorus	Algae	Trophic	Max Depth	Access
1	Great Pond-NorthRockingham	No recent samples	16 µg/L	3.7 µg/L	No recent samples	No recent samples	✓ Public
2	Pleasant Lake-Deep SpotRockingham	24.6 ft	7.5 µg/L	2.3 µg/L	No recent samples	No recent samples	✓ Public
3	Jenness Pond-Deep SpotRockingham	No recent samples	7.3 µg/L	1.6 µg/L	No recent samples	No recent samples	✓ Public
4	Northwood Lake-Lynn Grove BeachRockingham	No recent samples	11.1 µg/L	No recent samples	No recent samples	No recent samples	Not recorded
5	Northwood Lake-Old DumpRockingham	No recent samples	12.4 µg/L	No recent samples	No recent samples	No recent samples	Not recorded
6	Northwood Lake-Town BeachRockingham	No recent samples	13 µg/L	No recent samples	No recent samples	No recent samples	Not recorded
7	Onway Lake-Deep SpotRockingham	No recent samples	15.2 µg/L	3.6 µg/L	No recent samples	No recent samples	Not recorded
8	Onway Lake-Island RoadRockingham	No recent samples	8.8 µg/L	No recent samples	No recent samples	No recent samples	Not recorded
9	Onway Lake-Sandy CoveRockingham	No recent samples	11.3 µg/L	No recent samples	No recent samples	No recent samples	Not recorded
10	Onway Lake-SeannikkiRockingham	No recent samples	10.6 µg/L	No recent samples	No recent samples	No recent samples	✓ Public
11	Pawtuckaway Lake-Dolloff DamRockingham	No recent samples	9.2 µg/L	No recent samples	No recent samples	No recent samples	Not recorded
12	Rock Pond-Deep SpotRockingham	No recent samples	13.2 µg/L	5.1 µg/L	No recent samples	No recent samples	Not recorded
13	Beaver Lake-Deep SpotRockingham	No recent samples	18.7 µg/L	5.8 µg/L	No recent samples	No recent samples	✓ Public
14	Captains Pond-Boat LaunchRockingham	No recent samples	26.9 µg/L	No recent samples	No recent samples	No recent samples	Not recorded
15	Captains Pond-Camp Y WoodRockingham	No recent samples	20.1 µg/L	No recent samples	No recent samples	No recent samples	Not recorded
16	Captains Pond-Deep SpotRockingham	No recent samples	25.6 µg/L	3.8 µg/L	No recent samples	No recent samples	Not recorded
17	Cobbetts Pond-ArmstrongRockingham	No recent samples	19.1 µg/L	No recent samples	No recent samples	No recent samples	✓ Public
18	Cobbetts Pond-Bella VistaRockingham	No recent samples	27.8 µg/L	No recent samples	No recent samples	No recent samples	Not recorded
19	Cobbetts Pond-Community BeachRockingham	No recent samples	19.3 µg/L	No recent samples	No recent samples	No recent samples	Not recorded
20	Cobbetts Pond-Town BeachRockingham	No recent samples	19.7 µg/L	No recent samples	No recent samples	No recent samples	Not recorded
21	Country Pond-Deep SpotRockingham	No recent samples	23 µg/L	3.7 µg/L	No recent samples	No recent samples	✓ Public
22	Governors Lake-Deep SpotRockingham	No recent samples	20.2 µg/L	4.9 µg/L	No recent samples	No recent samples	Not recorded
23	Great Pond-SouthRockingham	No recent samples	16.6 µg/L	3.7 µg/L	No recent samples	No recent samples	✓ Public
24	Harantis Lake-Deep SpotRockingham	No recent samples	20.9 µg/L	4.2 µg/L	No recent samples	No recent samples	Not recorded
25	Long Pond-Deep SpotRockingham	No recent samples	26.6 µg/L	3.2 µg/L	No recent samples	No recent samples	Not recorded
26	Millville Lake-Car-Mar CoveRockingham	No recent samples	23.3 µg/L	No recent samples	No recent samples	No recent samples	Not recorded
27	Millville Lake-Chucks CoveRockingham	No recent samples	21.4 µg/L	No recent samples	No recent samples	No recent samples	Not recorded
28	Millville Lake-Deep SpotRockingham	No recent samples	25.2 µg/L	No recent samples	No recent samples	No recent samples	Not recorded
29	Millville Lake-Right of WayRockingham	No recent samples	21.6 µg/L	No recent samples	No recent samples	No recent samples	Not recorded
30	Norton Pond-Deep SpotRockingham	No recent samples	24.4 µg/L	No recent samples	No recent samples	No recent samples	Not recorded
31	Pawtuckaway Lake-NorthRockingham	No recent samples	17.5 µg/L	8 µg/L	No recent samples	No recent samples	Not recorded
32	Pawtuckaway Lake-SouthRockingham	No recent samples	13.4 µg/L	7 µg/L	No recent samples	No recent samples	Not recorded
33	Powwow River LakeRockingham	No recent samples	18 µg/L	3.9 µg/L	No recent samples	No recent samples	Not recorded
34	Scobie Pond-Deep SpotRockingham	No recent samples	21.9 µg/L	No recent samples	No recent samples	No recent samples	✓ Public
35	Tower Hill Pond-Deep SpotRockingham	No recent samples	17.6 µg/L	No recent samples	No recent samples	No recent samples	✓ Public
36	Captains Pond-Buzzell CoveRockingham	No recent samples	28.7 µg/L	No recent samples	No recent samples	No recent samples	Not recorded
37	Harvey Lake-Deep SpotRockingham	No recent samples	21.1 µg/L	9.9 µg/L	No recent samples	No recent samples	Not recorded
38	Northwood Lake-Esther Lane DocksRockingham	No recent samples	30.5 µg/L	No recent samples	No recent samples	No recent samples	✓ Public
39	Northwood Lake-Horse FarmRockingham	No recent samples	49.8 µg/L	No recent samples	No recent samples	No recent samples	Not recorded
40	Phillips Pond-OutletRockingham	No recent samples	30 µg/L	No recent samples	No recent samples	No recent samples	✓ Public
41	Pleasant Lake-Loon CoveRockingham	No recent samples	31.6 µg/L	No recent samples	No recent samples	No recent samples	Not recorded
	Angle PondRockingham	10.3 ft	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Arlington Mill ReservoirRockingham	No recent samples	No recent samples	No recent samples	No recent samples	35 ft	Not recorded
	Beaver PondRockingham	No recent samples	No recent samples	No recent samples	No recent samples	40 ft	Not recorded
	Calef PondRockingham	No recent samples	No recent samples	No recent samples	No recent samples	7 ft	Not recorded
	Canobie LakeRockingham	No recent samples	No recent samples	No recent samples	No recent samples	55 ft	✓ Public
	Captain Pond-GallowRockingham	No recent samples	21 µg/L	No recent samples	No recent samples	No recent samples	Not recorded
	Clark PondRockingham	No recent samples	No recent samples	No recent samples	No recent samples	3.9 ft	Not recorded
	Cub PondRockingham	No recent samples	No recent samples	No recent samples	No recent samples	10 ft	Not recorded
	Deer PondRockingham	No recent samples	No recent samples	No recent samples	No recent samples	13.1 ft	Not recorded
	Durgin PondRockingham	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Eel PondRockingham	No recent samples	No recent samples	No recent samples	No recent samples	3 ft	Not recorded
	Freeses PondRockingham	No recent samples	No recent samples	No recent samples	No recent samples	10 ft	Not recorded
	Greenwood PondRockingham	No recent samples	No recent samples	No recent samples	No recent samples	10 ft	✓ Public
	Harvey Lake-Boat LaunchRockingham	No recent samples	29.2 µg/L	No recent samples	No recent samples	No recent samples	Not recorded
	Hoar PondRockingham	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Jenness Pond-Hood BeachRockingham	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Little Bow PondRockingham	No recent samples	No recent samples	No recent samples	No recent samples	20 ft	Not recorded
	Little Massabesic LakeRockingham	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Lucas PondRockingham	No recent samples	No recent samples	No recent samples	No recent samples	40 ft	Not recorded
	Massabesic LakeRockingham	No recent samples	No recent samples	No recent samples	No recent samples	50 ft	✓ Public
	Meadow PondRockingham	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	North Mill PondRockingham	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	North River PondRockingham	No recent samples	No recent samples	No recent samples	No recent samples	19 ft	Not recorded
	Northwood Lake-BlodgettRockingham	No recent samples	132 µg/L	No recent samples	No recent samples	No recent samples	Not recorded
	Northwood Lake-Pine PointRockingham	No recent samples	10.3 µg/L	No recent samples	No recent samples	No recent samples	Not recorded
	Nottingham LakeRockingham	No recent samples	No recent samples	No recent samples	No recent samples	8.5 ft	Not recorded
	Pawtuckaway Lake-Drowns DamRockingham	No recent samples	17.3 µg/L	No recent samples	No recent samples	No recent samples	✓ Public
	Phillips PondRockingham	No recent samples	No recent samples	No recent samples	No recent samples	15 ft	✓ Public
	Powwow PondRockingham	No recent samples	No recent samples	No recent samples	No recent samples	10 ft	✓ Public
	Quincy PondRockingham	No recent samples	No recent samples	No recent samples	No recent samples	21.3 ft	Not recorded
	Rock Pond-PicRockingham	No recent samples	11.5 µg/L	No recent samples	No recent samples	No recent samples	Not recorded
	Round PondRockingham	No recent samples	No recent samples	No recent samples	No recent samples	50 ft	Not recorded
	Shadow LakeRockingham	No recent samples	No recent samples	No recent samples	No recent samples	25 ft	Not recorded
	Simpson PondRockingham	No recent samples	No recent samples	No recent samples	No recent samples	4.9 ft	Not recorded
	Taylor River ReservoirRockingham	No recent samples	No recent samples	No recent samples	No recent samples	5.6 ft	Not recorded
	Tuxbury PondRockingham	No recent samples	No recent samples	No recent samples	No recent samples	4.9 ft	Not recorded
	Wash PondRockingham	No recent samples	No recent samples	No recent samples	No recent samples	30 ft	Not recorded
	World End PondRockingham	No recent samples	No recent samples	No recent samples	No recent samples	5 ft	Not recorded

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 New Hampshire Department of Environmental Services. See data sources.