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Middlesex County drought holds steady
September 21, 2026
Middlesex County remains at 28.48% coverage in D1 (Moderate Drought) or worse as of the week of September 15–21, a plateau that has held for at least four weeks despite recent readings of dissolved oxygen showing recovery in the Hobbs Brook system.
Giant mayflies found in Natick
September 21, 2026
Giant Mayflies () were recorded in Natick and Middlesex County on August 26, 2026. These mayflies burrow in mud of slow-moving rivers and lakes, and their presence indicates aquatic habitat suitable for development of pollution-sensitive larvae.
Northern caddisflies found in East Arlington
September 21, 2026
(Limnephilidae) were recorded in East Arlington on September 20, 2026. These case-constructing caddisflies are abundant in northern temperate regions and their larvae require clean, well-oxygenated water to develop, making their presence in the watershed a marker of suitable aquatic habitat.
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