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East Cross Creek

East Cross Creek, located east of Lake Scugog, originates from the Oak Ridges Moraine and flows into the Scugog River. The creek spans a watershed area of approximately 108 square kilometers, with a network of streams contributing to its flow and ecological importance.

The watershed features a diverse landscape, with 52% natural cover dominated by coniferous forests. Notable ecological features include the East Cross Creek Wetland, a Provincially Significant Wetland covering 1,721 hectares, and the East Cross Creek Area of Natural and Scientific Interest (ANSI), which spans 858 hectares. These significant natural areas provide essential habitats for wildlife and contribute to the region’s rich biodiversity.

Environmental monitoring by Kawartha Conservation has determined that the surface water quality of East Cross Creek is rated as fair. This assessment is based on total phosphorus levels and the health of benthic macroinvertebrate communities, which serve as indicators of waterway health. Groundwater quality in the watershed is excellent, with chloride and nitrogen levels well below provincial drinking water standards. Forest conditions are rated as fair, reflecting the state of the area’s natural vegetation and highlighting opportunities for conservation and restoration.

East Cross Creek plays a vital role in the ecological health of the Scugog River system. Continued monitoring and management by Kawartha Conservation help ensure the sustainability of this important watercourse and its surrounding natural features.

View Map Of

East Cross Creek

Watershed characteristics

Learn about the characteristics of the East Cross Creek watershed.

The total watershed area is 108 km² or 10,824 ha and the total watercourse length is 148 km.

The dominant forest type is coniferous forest including:

  • Forest interior: 1,335 ha
  • Forest deep interior: 576 ha
  • 52% natural cover

Provincially Significant Wetland: East Cross Creek Wetland #15: 1,721 ha

ANSI - Life Science

  • East Cross Creek: 858 ha
  • Long Sault Forest (ANSI Candidate): 35 ha

Additional:

  • Greenbelt - Protected countryside within Durham: 38 km²
  • Significant Woodlands (Durham Region Only): 2,526 ha
  • Significant Ecological Areas (Ontario Ministry of Natural Resources and Forestry), other identified wetlands: 83 ha
  • Environmentally sensitive areas: 135 ha

Environmental conditions

The following grades show the environmental conditions for the East Cross Creek watershed.

Surface water quality
Indicator Result Grade Status

Total phosphorus

0.017 mg/L

A

Excellent

Benthic macroinvertebrates

5.65 (FBI)

C

Fair

The surface water quality grade was based on total phosphorous (TP) and/or benthic macroinvertebrates (aquatic insects) and their family biotic index (FBI). The provincial water quality objective for TP in rivers and streams is 0.03 mg/L and 0.02 mg/L in lakes. These guidelines were set because levels highter than these guildelines provide conditions for nuisance algae and aquatic plant growth. A TP value below 0.03 mg/L (rivers) or 0.02 (lakes) meets the provincial guidelines and is in the B (good) or A (excellent) grade range, while the result for benthic macroinvertebrates must be 5.00 or lower to receive a B (good) or A (very good to excellent) grade.

Groundwater conditions – well 484-1
Indicator Result Indicator grade Combined grade

Nitrate + nitrite

0.093 mg/L

A

 

A

 

Chloride

1.70 mg/L

A

Groundwater conditions – well 485-1
Indicator Result Indicator grade

Nitrate + nitrite

0.093 mg/L

A

Chloride

1.70 mg/L

A

Chloride levels in both wells are excellent and fall below the Provincial Drinking Water Aesthetic Objective of 250 mg/L. Nitrogen levels in both wells are below the Provincial Drinking Water Maximum Acceptable Concentration of 10 mg/L. Groundwater quality results from the wells do not represent groundwater quality across the subwatershed, but rather, the water quality within the aquifer in which the well is located.

Forest conditions
Indicator Area cover Percent cover Grade Status

Forest cover

45.2 km²

41.7%

A

Excellent

Forest interior

16.3 km²

15.1%

A

Excellent

Forested riparian cover

4.4 km²

51.0%

B

Good

The combined forest conditions grade for East Cross Creek is ranked as fair.

Wetland conditions
Indicator Area cover Percent cover Grade Status

Wetland cover

19.9 km²

18.4%

A

Excellent

 

 

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