Maltby Lake #3, Orange


2004 Aquatic Plant Survey Map of Maltby Lake #3

(1.5 MB, .pdf format*)

Transect Data (225 KB, .pdf format*) | Water Data

   Maltby Lake # 3, at 25.3 acres, is the largest of the Maltby reservoirs owned by the South Central Connecticut Regional Water Authority in West Haven.  The maximum depth of Maltby Lake # 3 is 26 feet.  The lake is bordered by forest to the north and west and by Route 34 to the southeast. The lake is open for fishing by special permit, but boats are prohibited.  Compared to the other Maltby Lakes, Maltby Lake # 3 supports the richest community of aquatic plants, with a total of 10 species.


   The most species-rich area was a large, shallow cove in the lake’s northwest, where Potamogeton gramineus and Najas guadalupensis were most abundant.  Najas guadalupensis was confined to the middle of the cove and to the channel connecting the cove to the main body of the lake. Potamogeton gramineus was found primarily in shallow water around the edge of the cove.


   Potamogeton bicupulatus was abundant on the northern and eastern sides of the cove.  Polygonum amphibium was found in small patches and growing with the Potamogeton bicupulatus. Potamogeton amplifolius occurred in small patches in the cove and in the channel.  Najas minor and Potamogeton bicupulatus were less abundant, located in the northwestern area of the cove.  Elodea nuttalli covered the bottom near a culvert through which a stream entered the cove.


   The main body of the lake was more sparsely vegetated.  The most abundant species were Potamogeton gramineus, which was widespread around the lake, and Najas guadalupensis, which occurred only on the northern and western sides of the lake.  Potamogeton epihydrus was found in large patches in the southern area of the lake. Potamogeton perfoliatus also was found in this area and near the mouth of the channel to the cove in the lake’s northwest.  Potamogeton bicupulatus was found in small patches at the lake’s northern end and Polygonum amphibium was found in small patches on the eastern and western sides of the lake and around islands in the southern part of the lake. An Eleocharis sp. was recorded in a small patch at the northern end of the lake.

Find Common Plant Names

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Species recorded in our 2004 survey of Maltby Lake No. 3. Click on plant for herbarium mount. (invasive species in bold)

Elodea nuttallii

Najas guadalupensis

Najas minor

Polygonum amphibium

Potamogeton amplifolius

Potamogeton bicupulatus

Potamogeton epihydrus

Potamogeton gramineus

Potamogeton perfoliatus

Eleocharis cf. acicularis


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