The Lakes • Western Connecticut Planning Region, Connecticut • Surveyed

Lake Lillinonah

100 ftDeepest, as U.S. Geological Survey (WRI 95-4098, Water-quality characteristics of selected public recreational lakes and ponds in Connecticut) publishes it, read on its page 17 October 2026

80 ftThe deepest contour in Connecticut DEEP's survey, drawn every 20 ft

Where our figure and the state's part: the state's maximum is one sounding and the deepest contour is a line drawn above it; the gap is inside one contour interval (20 ft, exactly one 20 ft interval).

Every contour on the print is a line the state's surveyors drew; nothing between them is guessed. Pin your dock in the studio and it prints under the name your family uses.

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What arrives: the print you set up, drawn at the size you choose, shipped flat or rolled by the printer, or a file the same day for the digital edition.

Three of the Nine Styles

Lake Lillinonah in Bathymetric on Clear Water, its depth contours drawn from the state's survey. — Bathymetric

Lake Lillinonah in Chart on Chart, its depth contours drawn from the state's survey. — Chart

Lake Lillinonah in Survey on Ink, its depth contours drawn from the state's survey. — Survey

The figures

Water	1,547 acres published, 1,597 acres measured
Shoreline	35.9 mi, islands included
Longest open water	2.9 mi
Islands	2
Depth survey	Connecticut DEEP, read 18 October 2026

Where each figure comes from

shoreline, OpenStreetMap via Overpass: www.openstreetmap.org, read 18 October 2026
depth contours, Connecticut DEEP: services1.arcgis.com, read 18 October 2026
published, quoted: Lake Lillinonah has an area of 769 ha (1,900 acres), a maximum depth of 30.5 m (100 ft), a mean depth of 7.6 m (25 ft): pubs.usgs.gov, read 17 October 2026
published, quoted: LAKE LILLINONAH, Brookfield-Bridgewater-Newtown-Southbury-New Milford; 1,547 acres: portal.ct.gov, read 17 October 2026

Not affiliated with or endorsed by any state agency, lake association or realtor; no logos on any print. The drawing is ours, made from the OpenStreetMap shoreline as of 18 October 2026 (© OpenStreetMap contributors. Open Database License 1.0: https://www.openstreetmap.org/copyright).