449 Long Harbour · groundwater level and daily draw
Groundwater level is the depth the water settles to with the pump off — the water table itself, not the working level. Derived from all 1,350,513 readings by extrapolating each pump-off recovery to the depth where refill would reach zero, then smoothed to a 3-day average plotted once per week; short gaps are interpolated so the line stays continuous, and weeks with fewer than 3 logged days are dropped rather than plotted from thin data. Where the well never rested long enough the value is an upper bound — the true table sits somewhere above the line.
Daily range is the 1st–99th percentile of each day's readings, not the absolute extremes. The meter occasionally returns a single false echo — a premature reflection off a torque arrester or fracture, which reads shallow. 7,439 such single-sample excursions (0.55%) were removed outright; percentiles absorb the rest. With ~32 pump cycles a day this also reads as the typical best recovery and typical cycle peak, which is more representative than one reading.
Pumped from well is detected pump run-time × 10.67 gpm, shown as weekly bars (7-day averages) — day-to-day draw is noisy and the story here is seasonal. Weeks with fewer than 3 logged days are interpolated between their neighbours and drawn faint (marked * in the readout); nothing is extrapolated past the ends of a year's record. Sound check: measured volume never exceeds what the pump timer physically allows, and July 2026 runs at 97% of that ceiling.