LakeReport_Loop_html.utf8.md

Data period: through 2018

Town	County	Delorme Map #	True Basin	Flushing Rate	Elevation
MADISON	SOMERSET	20	1	0.89 flushes/yr	335 ft

Maximum Depth	Average Depth	Surface Area	Lake Volume	Drainage Area
7 m (22 ft)	4 m (13 ft)	572 ha (1,413 ac)	22,888,613 m³ (18,556 ac-ft)	41 km² (16 mi²)

Secchi Disk Transparency Graphs

Graph Legend: Secchi symbols = average Secchi Disk Transparency Values; tick marks = maximum and minimum values for each year.

Water Chemistry and Trophic State Parameters

**Table Legend:**

**Color**: Color (SPU), **Alk**: Alkalinity (mg/l CaCO₃), **SpCon**: Specific Conductivity (\(\mu\)S/cm), pH: pH (standard units)

TP = Total Phosphorus (\(\mu\)g/L) – EC: Epilimnion Core, SG: Surface Grab, BG: Bottom Grab, PG: Profile Grab

**SDT** = Secchi Disk Transparency (m) – **Min**: minimum value, **Avg**: average value, **Max**: maximum value, n: number of months with Secchi readings per year, b: number of times Secchi disk was observed touching the bottom of the lake per year
**Chl** = Chlorophyll-a (\(\mu\)g/L) – **Min**: minimum value, **Avg**: average value, **Max**: maximum value
Year	Color	Alk	SpCon	pH	TP-EC	TP-SG	TP-BG	TP-PG	SDT-Min	SDT-Avg	SDT-Max	SDT-n	SDT-b	Chl-Min	Chl-Avg	Chl-Max
1970									6.6	6.8	7.0	4	4
1971									5.2	6.5	7.0	5	2
1972						15.0	5.5		6.0	6.4	7.0	4	1
1973							7.0		4.9	5.8	6.8	2
1978		14	62						4.7	5.4	6.2	5	1	2.2	2.2	2.2
1980									4.9	4.9	4.9	1	1
1981		15	48		10.0				3.1	4.1	5.4	3	2	4.1	4.1	4.1
1982									4.8	6.0	6.8	5	1
1983									3.8	5.0	6.5	7
1984		13			6.0				3.7	5.1	6.4	7	1	3.0	3.0	3.0
1985									4.8	5.8	6.6	8	1
1986									4.9	5.7	6.7	5
1987		18	50		8.0				4.1	5.9	7.1	7	4
1988									5.0	6.7	7.3	7	11
1989									4.1	5.3	6.9	6
1990									5.0	6.5	7.5	7	9
1991		25	60	7.1	7.0				3.7	6.0	7.3	6	3
1992									4.4	6.5	7.5	6	8
1993									4.2	6.0	7.2	5	2
1994									2.8	5.2	7.3	8	5
1995									4.8	6.2	7.1	8	4
1996									4.3	5.5	6.4	6
1997		18	66	7.4	7.0				3.9	6.0	7.2	8	8	3.2	3.2	3.2
1998									4.4	5.5	7.3	8	2
1999									3.9	5.3	7.2	7	4
2000									4.4	5.9	7.4	8	2
2001									4.8	5.9	7.0	6
2002	17	19	73		7.0				5.1	5.9	7.1	7		3.8	3.8	3.8
2003						6.0			4.4	6.1	7.3	5	2
2004									4.6	5.6	7.1	7
2005	15				7.3	6.0			4.0	5.7	6.8	9
2006						7.8			4.3	5.6	7.1	10
2007	13	16	60	7.5		7.0			6.0	6.5	7.2	7	2
2008						7.2			4.1	5.3	7.3	7	2
2009						7.0			4.6	6.0	7.3	7	3
2010									5.4	6.5	7.2	5	1
2011		9			9.0	7.0			4.8	5.5	6.9	8		6.0	6.0	6.0
2012						5.8			4.4	5.7	7.3	9	2
2013						6.0			4.5	5.7	7.4	6	1
2014						10.2			4.4	6.0	7.2	8	1
2015						4.7			5.0	6.4	7.2	10	3
2016						7.0			5.4	6.6	7.4	9	3
2017	12	19	80	7.5	8.0	8.0			4.1	5.2	6.4	8		4.6	4.6	4.6
2018	7	19	82	7.7	10.0	7.0			4.5	6.0	7.0	5		6.0	6.0	6.0

Lake Chemistry and Trophic Summary Data - Overall Summary Values:

Avg Color	Avg Alk	Avg SpCon	pH	Avg TP-EC	Avg TP-SG	Avg TP-BG	Avg TP-PG	SDT-Min	SDT-Avg	SDT-Max	SDT-n	Chl-Min	Chl-Avg	Chl-Max
13	17	64	7.4	7.9	7.4	6.2		2.8	5.8	7.5	6.5	2.2	4.1	6

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L

	2016-09-10		2017-08-19		2017-08-23		2017-08-28		2017-09-08		2018-08-16		2018-08-17		2018-09-14
Depth (m)	TEMP	DO	TEMP	DO	TEMP	DO	TEMP	DO	TEMP	DO	TEMP	DO	TEMP	DO	TEMP	DO
0	24	7.5	23	7.1	23	8.4	23	7.2	19	7.9	26	8.0	25	6.6	22	7.4
1	24	7.5	22	7.2	23	8.4	22	7.2	19	7.9	26	8.0	25	6.6	22	7.4
2	24	7.5	22	7.2	23	8.3	22	7.2	19	7.9	26	8.0	25	6.6	22	7.4
3	24	7.5	22	7.1	23	8.2	22	7.2	19	7.8	26	8.0	25	6.5	22	7.4
4	24	7.5	22	7.1	23	7.7	22	7.1	19	7.8	26	8.0	25	6.5	22	7.3
5	23	7.1	22	7.0	23	7.9	22	7.1	19	7.8	26	8.0	25	6.5	21	7.0
6	22	5.8	22	6.9	22	7.3	22	7.1	19	7.8	26	8.0	25	6.4	21	7.0
7	22	5.2	22	6.7	22	6.9	22	7.1	19	7.8	26	5.2	25	6.4	21	6.9

Most recent temperature and dissolved oxygen profile plots

Temperature (°C), Dissolved Oxygen (mg/L)