Maumee Lake Plain

Northville MS4-Oakland is in Significant Non-Compliance with its Clean Water Act permit for being more than 30 days late reporting progress on its compliance schedule. The facility operates a municipal separate storm sewer system in Oakland County and must bring its compliance reporting current to return to standard permit status.

Through October 20, Detroit Willow Run Airport 8 km away recorded 2.1 inches of precipitation, 0.6 inches above normal for this date. September 2026 at the county level averaged 3.3 inches, 0.4 inches above normal, ranking 44th wettest of 132 September records since 1895.

Summer Flier Sedges caddisfly larvae were observed September 29 in Canton Township. Caddisflies are sensitive indicators of clean, flowing water; their presence suggests acceptable conditions at the observation point.

The entire county entered abnormal dryness the week of August 18 and has remained in D0 or worse through October 19. While no severe drought has developed, the persistent dry condition has lasted nine weeks without relief, potentially reducing available water for vernal pools and surface-dependent amphibian breeding habitats.

Common buckthorn was recorded 6 times in the past 30 days, most recently on 2026-10-16 in Livonia. This introduced shrub continues to be documented across multiple sites in the ecosystem including Canton Township and Plymouth, establishing a persistent presence as an invasive plant in the area.

New England aster was observed flowering on 2026-10-16 in LeFurge Woods Nature Preserve near Ypsilanti. This native fall-blooming perennial remains in flower well into mid-October, supported by above-normal temperatures: mean daily highs over the past 30 days ran 4°F above normal and October temperatures in Wayne County averaged 56°F, 4.7°F above the 1901-2000 baseline. Warmer conditions are extending the blooming window into autumn.

A Ruby-throated Hummingbird was observed on 2026-10-17 at Brownton Abbey, confirmed by regional eBird reviewers. By mid-October, most Ruby-throated Hummingbirds should have cleared the eastern US on their way to Central America; this sighting represents a straggler finishing migration or possibly an injured or delayed bird that may need feeders to fuel its journey south.

White-throated Sparrows are in heavy fall passage through the region, with 25 birds recorded on 2026-10-19 at Zibiwes Nature Area. This marks the peak of their southbound migration as they leave northern breeding grounds for winter grounds in the southern United States and Central America. The high count reflects the concentrated timing of fall migration in October.

Wayne County received 27 inches of precipitation in the 12-month period ending August 2026, 3.6 inches below the 1901-2000 normal of 30.6 inches. This ranks 22nd driest of 131 such periods on record, placing this year in the drier half of the historical range.

Wayne County crossed into Moderate Drought (D1) the week of 2026-09-15 to 2026-09-21, with 38.66% of the county now in this category. The drought classification emerged in late August when the county had no drought designation, concentrating any pollutants in reduced streamflow and warming waters.