The Oro Loma Sanitary District/Castro Valley Sanitary District Water Pollution Control Plant is more than 80 years old. That doesn’t mean it can’t be held to high standards.Despite its age, the plant can churn out up to 20 mgd of high-quality effluent in serving a population of 180,000 in the Oro Loma (California) Sanitary District. The plant consistently outperforms regulatory standards. Plant personnel track 25 performance benchmarks that cover everything from regulatory compliance to energy use and customer service.The plant’s advanced nutrient removal process maintains total inorganic nitrogen below 10 mg/L, well under the permit limit for nutrient discharges to
