| Year | Max Depth (inches) | Date |
|---|---|---|
| 2024 | 15.0 | January 13 |
| 2023 | 12.0 | March 10 |
| 2022 | 5.0 | January 16 |
| 2021 | 12.0 | January 31 |
| 2020 | 10.0 | February 10 |
| 2019 | 13.0 | January 29 |
| 2018 | 6.0 | January 16 |
| 2017 | 6.0 | January 26 |
| 2016 | 9.0 | January 1 |
| 2015 | 12.0 | December 29 |
| 2014 | 8.0 | February 18 |
| 2013 | 15.0 | February 28 |
| 2012 | 12.0 | December 29 |
| 2011 | 21.0 | February 2 |
| 2010 | 13.0 | February 10 |
| 2009 | 13.0 | December 9 |
| 2008 | 17.0 | December 25 |
| 2007 | none | – |
| 2006 | none | – |
| 2005 | 5.0 | January 6 |
| 2004 | 5.0 | February 9 |
| 2003 | 5.0 | March 2 |
| 2002 | none | – |
| 2001 | 2.0 | April 1 |
| 2000 | 5.0 | December 28 |
| 1999 | none | – |
| 1998 | none | – |
| 1997 | none | – |
| 1996 | none | – |
| 1995 | none | – |
| 1994 | none | – |
| 1993 | none | – |
| 1992 | 1.0 | January 19 |
| 1991 | 13.0 | January 12 |
| 1990 | 14.0 | December 5 |
| 1989 | 18.0 | March 20 |
| 1988 | 19.0 | January 26 |
| 1987 | 12.0 | December 15 |
| 1986 | 18.0 | January 3 |
| 1985 | 19.0 | February 11 |
| 1984 | 13.0 | January 28 |
| 1983 | 12.0 | February 7 |
| 1982 | 27.0 | January 22 |
| 1981 | 13.0 | February 10 |
| 1980 | 11.0 | February 6 |
| 1979 | 28.0 | January 24 |
| 1978 | 18.0 | December 31 |
| 1977 | 12.0 | November 27 |
| 1976 | 16.0 | January 25 |
| 1975 | 10.0 | March 12 |
| 1974 | 21.0 | February 6 |
| 1973 | 14.0 | April 9 |
| 1972 | 12.0 | January 1 |
| 1971 | 20.0 | March 19 |
| 1970 | 11.0 | January 1 |
| 1969 | 15.0 | December 23 |
| 1968 | 13.0 | December 30 |
| 1967 | 12.0 | January 6 |
| 1966 | 14.0 | December 28 |
| 1965 | 8.0 | March 17 |
| 1964 | 10.0 | March 5 |
| 1963 | 10.0 | January 12 |
| 1962 | 12.0 | March 5 |
| 1961 | 2.0 | January 31 |
| 1960 | 6.0 | January 18 |
| 1959 | 3.0 | November 13 |
| 1958 | 2.0 | February 28 |
| 1957 | 6.0 | January 28 |
| 1956 | 6.0 | March 8 |
| 1955 | 4.0 | November 28 |
| 1954 | 12.0 | January 27 |
| 1953 | 10.0 | January 18 |
| 1952 | 4.0 | February 8 |
| 1951 | 8.0 | December 18 |
| 1950 | 7.0 | February 14 |
| 1949 | 6.0 | January 21 |
| 1948 | 7.0 | December 29 |
| 1947 | 1.0 | May 5 |
| 1946 | none | – |
| 1945 | none | – |
| 1944 | none | – |
| 1943 | none | – |
| 1942 | none | – |
| 1941 | none | – |
| 1940 | none | – |
| 1939 | none | – |
| 1938 | none | – |
| 1937 | none | – |
| 1936 | 1.0 | March 22 |
| 1935 | none | – |
| 1934 | 1.0 | April 1 |
| 1933 | none | – |
| 1932 | 1.0 | December 4 |
| 1931 | none | – |
| 1930 | none | – |
| 1929 | none | – |
| 1928 | none | – |
| 1927 | none | – |
| 1926 | none | – |
| 1925 | none | – |
| 1924 | 3.0 | November 17 |
| Years | Station | Coordinates |
|---|---|---|
| 1910–2024 | Plymouth WWTP | location |