Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
RAINBOW TWP PISCATAQUIS 50 1 0.21 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
40 m
(130 ft) 		12 m
(39 ft) 		658 ha
(1,625 ac) 		78,138,464 m3
(63,348 ac-ft) 		17 km2
(6.7 mi2)

Secchi Disk Transparency Graphs

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

## [1] "No 2017 Secchi Disk Transparency Data"

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
1986 5.0 18 2 5 12 12 12 1 1.0 1.0 1.0
1989 4.2 19 2 13 13 13 1 0.6 0.6 0.6
1996 6.0 19 1 3 12 12 12 1 1.1 1.1 1.1
2004 3 6.5 21 7 2 10 12 14 2 0.8 0.8 0.8

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
3 5.4 19 7 1.7 2 4 10 12 14 1.2 0.6 0.9 1.1

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1986-09-08
1989-09-19
1996-08-28
2004-08-09
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO
0 16.8 8.6 17.0 9.4 21.2 8.0 20 8.6
1 17.0 9.4 21.2 8.8 20 8.6
2 16.8 8.2 17.0 9.3 21.1 8.8 20 8.6
3 17.0 9.3 21.0 8.8 20 8.6
4 16.8 8.0 17.0 9.3 21.0 8.8 20 8.6
5 17.0 9.3 20.9 8.8 20 8.6
6 16.8 7.0 17.0 9.3 20.9 8.8 20 8.6
7 17.0 9.3 20.9 8.8 20 8.6
8 16.8 6.2 17.0 9.3 20.8 8.8 20 8.6
9 17.0 9.3 19.9 9.0 20 8.6
10 16.8 6.0 16.9 9.3 18.2 9.2 19 9.4
11 16.9 9.3 17.2 9.2 18 9.5
12 16.8 6.0 16.6 9.3 16.3 9.3 17 9.6
13 15.2 9.6 14.8 9.4 17 9.6
14 16.8 5.8 14.0 10.3 13.1 9.7 16 9.5
15 12.8 10.4 11.9 9.7 16 9.4
16 11.0 9.8
17 10.0 12.0 10.8 9.8
18 16.8 5.6 10.4 9.6
19 8.0 12.0 10.2 9.8
20 16.8 5.5 9.9 9.8
21 6.9 11.8 9.3 9.6
22 15.0 5.0 9.0 9.4
23 6.8 11.4 8.4 9.4
24 11.0 5.3 8.1 9.0
25 6.1 10.6 8.0 8.8
26 9.0 5.3 7.9 8.5
27 7.8 8.0
28 8.2 5.2 7.6 7.7
29 7.4 7.5
30 7.8 4.8 5.4 9.2 7.3 7.0
31
32
33
34
35 5.1 8.7
36
37
38
39
40 5.1 8.1
41
42
43
44
45 5.0 7.4
46
47
48
49
50 5.0 6.5

Recent temperature and dissolved oxygen profile plots

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