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Central Coast staff present ranch‑level A‑minus‑R calculations and groundwater dashboard showing extensive nitrate exceedances
Summary
Central Coast Water Board staff showed how ranch‑level applied‑minus‑removed calculations are computed, introduced an interactive groundwater dashboard and maps, and highlighted high percentages of domestic‑well nitrate exceedances in agriculture areas; staff asked the panel to weigh in on discount/credit factors in the A‑minus‑R formula.
Central Coast Water Board staff presented a technical briefing to the State Water Resources Control Board expert panel on Oct. 31 showing how the Central Coast region calculates ranch‑level nitrogen discharge and how those numbers relate to groundwater data. The staff presentation focused on parameters used in the A‑minus‑R (applied minus removed) compliance formula and the evidence behind credits and discount factors the panel was asked to evaluate.
Elaine Saul (Central Coast Water Board) walked panelists through an illustrative ranch example and explained inputs counted in the "applied" side (fertilizer, compost, organic fertilizers, irrigation water)…
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