Flow & capacity

Plant comparison

One row per treatment plant across the full reporting window. Excursion counts identify days where reported effluent values cleared the SPDES permit envelope (pH outside 6.0–9.0; settleable solids above 0.1 mL/L). Censored (“<0.1”) settleable readings are treated as 0.05 mL/L for charting and excursion-detection purposes. Implausibly large settleable readings (> 5 mL/L, traced to extractor errors against the March 2025 DMR) are filtered out before counting excursions.

Capacity headroom

Distribution of daily average flow per plant (0.005 MGD bins). Vertical dashed lines mark each plant’s SPDES design capacity (0.050 MGD for the Village WWTP via sub-outfall 01A; 0.025 MGD for Red Hook Commons via sub-outfall 01B). Days that sit to the right of the line are days the plant ran above its permitted monthly-average design flow.

Design-flow values from the 2025 Engineering Report responding to the DEC consent order (wwtp::2670

Monthly average flow

Mean of daily flow (MGD) computed over the FULL number of days in the month, not just the days with reported data. A month with the plant offline for half the month reads as half its operating average — surfaces outages instead of hiding them. The “days” column shows how many days actually reported data so partial months are easy to spot. Deduped by (date, plant) to avoid double-counting overlapping filings.

Cumulative volume treated

Running cumulative volume (MG) per plant per Village fiscal year (June–May). Useful as a billing rate-base anchor since utility billing is volumetric: total MG actually treated sets the floor on any per-MG charge that recovers fixed operating cost. Lines reset at each fiscal-year boundary; partial fiscal years are shown only as far as the data extends.

One row per day, deduped to the most-complete filing. BOD₅ and suspended-solids samples are pulled on permit-defined sample days only and appear blank otherwise. Settleable solids reported as “<0.1” were below the lab’s detection limit.