Triassic Lowlands

Mendham Boro is in Significant Non-Compliance for an effluent violation, having discharged more of a pollutant than its permit allows based on a monthly average. This active violation indicates the facility is currently exceeding one or more discharge limits under its Clean Water Act permit.

Month-to-date precipitation through September 21 was 5.7 inches, 3 inches above the normal of 2.7 inches at Boonton station 13 km away. The surplus is likely suppressing short-term fire risk, though it reflects an unusually wet September relative to the long-term average.

Fowler's toad, a state-threatened amphibian, was recorded five times between August 27 and September 7 around Boonton, Kinnelon and Mine Hill. The species presence indicates adequate palustrine wetland conditions to support populations, with forested wetlands covering 32% of mapped area and maintained seasonal saturation.

Eastern box turtle, state-threatened, was observed September 15, 11, 9, and 1 within the area. The repeated observations in early fall suggest established presence in a landscape with abundant palustrine wetlands and 2,172 acres of forested and emergent wetland habitat.

Japanese knotweed was confirmed at Morristown National Historical Park on September 7. This invasive herbaceous perennial is established in numerous habitats across North America and Europe and poses risk to native plant communities.

Drought has broken hard over Morris County. A year of near-constant dryness peaked in late June, when moderate drought covered the entire county, the same stretch when black tupelos here were already flaming into premature scarlet and beech leaves were showing the dark veinal banding of Beech Leaf Disease. Since then the numbers have reversed fast: moderate drought fell to about 22% of the county by late July, then to roughly 2%, and by the first week of August it registered zero. That's a real shift in water availability across the Triassic Lowlands, not just a lull. What it means for the trees already stressed is a separate question, though. A tupelo that dropped leaves early in June has more soil moisture to work with now, but early leaf drop isn't reversible this season; the tree simply banked less energy before going dormant. Beech Leaf Disease follows a different mechanism entirely. It's driven by a nematode feeding inside the leaf tissue, not by drought stress, so easing water conditions won't slow the banding or the leaf curling that follows. The drought spike likely made both trees more vulnerable to what came next, but its disappearance doesn't undo either process. It will be worth watching whether next year's growth shows any recovery in the tupelos, even as the beech disease keeps its own separate course.

American beech trees here are now showing the telltale dark banding between leaf veins that marks Beech Leaf Disease — associated with a tiny nematode that was first documented in Ohio in 2012 and has since spread rapidly through the Northeast. The appearance of this condition in the understory is unwelcome news for trees already contending with beech bark disease, a decades-long epidemic combining an introduced scale insect and fungus that has been steadily killing mature beeches across the region. The ecological stakes are high. American beech is one of the forest's dominant mast producers, and its nuts are a critical fall and winter food source for black bear, wild turkey, and white-footed mice. With beech now under attack from two directions, these keystone food sources bear watching closely in the season ahead.

Black tupelo trees are showing autumn color in mid-July — a full two months ahead of their normal September scarlet display. This premature flaming is not a gift of an early fall, but a distress response. When water stress becomes acute, trees shed photosynthetic tissue they can no longer afford to maintain. Black tupelo is typically one of the most reliable autumn markers in the Northeast; its twisted, nearly unsplittable grain made it a valued wood for tool handles and mortars in Lenape hands, and that structural toughness has long outlasted the seasons. This summer, that resilience is being tested. Flowering dogwood is showing the same stress signatures. Water temperatures are holding near 25°C, and pH readings above 9 point to an active algal bloom in the slow reaches — conditions that compress the summer season from multiple directions. Sustained heat and drought are extracting a real physiological toll on the forest. The margin between adaptation and collapse, once measured in seasons, is narrowing to weeks.

Stream temperatures have climbed to 24–26°C this week, and the physiological stress is showing in the canopy. Red maples have begun shedding leaves in late June — nearly two months ahead of their normal autumn schedule — a classic drought-avoidance response to heat and drying soil. Norway maple is now in full fruit production across the region, from Denville south through the Watchung range. This European invader thrives precisely when native maples struggle—its ability to tolerate heat and drought, combined with the leaf gaps that stressed trees create, gives it ideal recruitment conditions. The phenological mismatch we're watching now—native stress and exotic vigor unfolding on the same timeline—hints at a longer-term shift in canopy composition.

Water pH hit 9.1 this morning — a chemical milestone that marks an algal bloom in full swing. As algae photosynthesize in warming water, they strip dissolved CO₂ from the system, driving pH upward past the safe threshold. Above 9, a critical shift occurs: the harmless ammonium in the water converts to toxic free ammonia, a poison that gills cannot tolerate. Fish already stressed by water temperature climbing to 23.5°C face a double squeeze. This isn't an isolated event. All 19 water bodies assessed within a five-mile radius are listed as impaired under federal standards. Dissolved oxygen, which should stay above 6 mg/L for most fish, has been fluctuating between 4.7 and 8.4 over the past week — a sign of acute stress pulsing through the system with each bloom surge and nighttime respiration. The Whippany and Passaic watersheds are showing what chronic nutrient enrichment looks like when summer heat and stagnation align.