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Pinole-Hercules plant reports compliant effluent levels as state tightens nutrient rules
Summary
Plant staff reported April–June flow and effluent performance, saying current effluent averages are below permit limits but that new state nutrient rules will require multi‑year planning and likely plant upgrades.
On July 10, 2025, staff at the Pinole‑Hercules Wastewater Treatment Plant presented monthly flow and performance data covering April through June and told the Pinole‑Hercules Wastewater Subcommittee that current effluent averages are within permit limits while the State Water Resources Control Board’s new nutrient requirements will require planning over the next decade.
The operations report, delivered by Josh Binder, wastewater treatment plant manager, showed the two cities each accounted for roughly half of plant flow in the reporting months and listed key effluent figures: a CBOD (carbonaceous biochemical oxygen demand) effluent average near 11.5 milligrams per liter with roughly 95–96%…
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