If Secchi depth is measured in a lake for numerous consecutive years, the data can be analyzed for water quality trends. If a significant trend indicates increasing Secchi depth over time, the water quality is improving. If a significant trend indicates decreasing Secchi depth over time, the water quality is declining.
to learn more visit
https://waterrangers.ca/testkits/tests/clarity-secchi/
| Lake Name | Township | STN | Site ID | Site Description | Latitude (DMS) | Longitude (DMS) | Year | Secchi depth, average (m) |
| CARSON LAKE | SHERWOOD, JONES & BURNS | 765 | 1 | Mid Lake, deep spot | 453050 | 774533 | 2018 | 5 |
| CARSON LAKE | SHERWOOD, JONES & BURNS | 765 | 2 | Mid lake, deep spot | 453059 | 774551 | 2018 | 5.7 |
| CARSON LAKE | SHERWOOD, JONES & BURNS | 765 | 2 | Mid lake, deep spot | 453059 | 774551 | 2019 | 6.2 |
| CARSON LAKE | SHERWOOD, JONES & BURNS | 765 | 2 | Mid lake, deep spot | 453059 | 774551 | 2020 | 6.4 |
| KULAS LAKE (GREENAN) | SHERWOOD, JONES & BURNS | 7312 | 2 | Mid lake, deep spot | 452811 | 774360 | 2013 | 5.3 |
| KULAS LAKE (GREENAN) | SHERWOOD, JONES & BURNS | 7312 | 2 | Mid lake, deep spot | 452811 | 774360 | 2014 | 4 |
| KULAS LAKE (GREENAN) | SHERWOOD, JONES & BURNS | 7312 | 2 | Mid lake, deep spot | 452811 | 774360 | 2016 | 6.1 |
| KULAS LAKE (GREENAN) | SHERWOOD, JONES & BURNS | 7312 | 2 | Mid lake, deep spot | 452811 | 774360 | 2017 | 3.5 |
| KULAS LAKE (GREENAN) | SHERWOOD, JONES & BURNS | 7312 | 2 | Mid lake, deep spot | 452811 | 774360 | 2018 | 5.4 |
| KULAS LAKE (GREENAN) | SHERWOOD, JONES & BURNS | 7312 | 2 | Mid lake, deep spot | 452811 | 774360 | 2019 | 5.4 |
| KULAS LAKE (GREENAN) | SHERWOOD, JONES & BURNS | 7312 | 2 | Mid lake, deep spot | 452811 | 774360 | 2020 | N/A |
| KULAS LAKE (GREENAN) | SHERWOOD, JONES & BURNS | 7312 | 3 | North shore, deep spot | 452831 | 774426 | 2018 | 4 |
| KULAS LAKE (GREENAN) | SHERWOOD, JONES & BURNS | 7312 | 3 | North shore, deep spot | 452831 | 774426 | 2020 | 4.2 |
| TROUT LAKE (STUBBS) | SHERWOOD, JONES & BURNS | 5450 | 1 | Mid Lake, deep spot | 452931 | 774433 | 2018 | 1.9 |
| TROUT LAKE (STUBBS) | SHERWOOD, JONES & BURNS | 5450 | 2 | Mid lake, deep spot | 452930 | 774433 | 2016 | 6.3 |
| TROUT LAKE (STUBBS) | SHERWOOD, JONES & BURNS | 5450 | 2 | Mid lake, deep spot | 452930 | 774433 | 2017 | 3.8 |
| TROUT LAKE (STUBBS) | SHERWOOD, JONES & BURNS | 5450 | 2 | Mid lake, deep spot | 452930 | 774433 | 2018 | 5.6 |
| TROUT LAKE (STUBBS) | SHERWOOD, JONES & BURNS | 5450 | 2 | Mid lake, deep spot | 452930 | 774433 | 2019 | 4.9 |
| TROUT LAKE (STUBBS) | SHERWOOD, JONES & BURNS | 5450 | 2 | Mid lake, deep spot | 452930 | 774433 | 2020 | 5.6 |
| TROUT LAKE (STUBBS) | SHERWOOD, JONES & BURNS | 5450 | 3 | outflow | 452908 | 774350 | 2016 | 6.5 |
| TROUT LAKE (STUBBS) | SHERWOOD, JONES & BURNS | 5450 | 3 | outflow | 452908 | 774350 | 2017 | 5.1 |
| TROUT LAKE (STUBBS) | SHERWOOD, JONES & BURNS | 5450 | 3 | outflow | 452908 | 774350 | 2018 | 5.5 |
| TROUT LAKE (STUBBS) | SHERWOOD, JONES & BURNS | 5450 | 3 | outflow | 452908 | 774350 | 2019 | 5.5 |
| TROUT LAKE (STUBBS) | SHERWOOD, JONES & BURNS | 5450 | 3 | outflow | 452908 | 774350 | 2020 | 7.32 |
| LEPINE (BUCH) | SHERWOOD, JONES & BURNS | 7313 | 2 | mid lake deep spot | 454774 | 777303 | 2018 | 5.5 |
| LEPINE (BUCH) | SHERWOOD, JONES & BURNS | 7313 | 2 | mid lake deep spot | 454774 | 777303 | 2019 | 5 |
| LEPINE (BUCH) | SHERWOOD, JONES & BURNS | 7313 | 2 | mid lake deep spot | 454774 | 777303 | 2020 | 4.8 |