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Septic Glossary

Nitrogen Reduction System

Advanced onsite treatment designed to lower nitrogen compounds in septic effluent to protect groundwater, creeks, and sensitive coastal receiving waters.

Nitrogen Reduction System

Also called: Denitrification unit, TN reduction system

What it means

Nitrogen reduction systems use specialized media, recirculation, or biological processes to convert nitrate and ammonia into nitrogen gas. They address nutrient pollution where standard septic tanks leave nitrogen in effluent.

These units require monitoring, periodic media replacement, and compliance with local nutrient management rules. They are often paired with other treatment or dispersal components.

Why it matters in Santa Cruz County

Santa Cruz County and regional water quality plans focus on nitrogen near the coast and lagoons, so new systems in sensitive areas may require nitrogen-reducing technology verified by Environmental Health.

Homeowner tip

Budget for scheduled media service on nitrogen units; skipping maintenance can fail compliance tests.

Related Wade's services

Also explore the Plumbing Glossary or call 831.225.4344 with questions about your property.