Including filter system and high-performance Nitrate filter.
Nitrate can travel through soil into groundwater and surface sources, so it may end up in a household water supply without any smell or taste to warn you. Many Cox homeowners only discover its presence from a lab test or utility notice about source water — visual inspection won’t reveal it. If you want the reassurance of treated water at every fixture, placing treatment where water enters the house is the most reliable way to protect every tap.
Because nitrate stays dissolved, it won’t settle like sediment and standard carbon cartridges won’t remove it effectively. That’s why families who already soften or filter for chlorine or sulfur may still need a different solution for nitrate. Nitrate and nitrite are related but require treatments that target dissolved ions; the sensible first move is testing your Cox water so you know whether nitrate is present and which treatment will work best.
For whole-house nitrate reduction, a whole-house reverse osmosis system is the single-filter approach that delivers the most consistent removal. RO systems use a semi-permeable membrane to reduce dissolved contaminants like nitrate instead of just improving taste and odor, and when installed at the point of entry they treat water used for showers, laundry, kitchens, and bathrooms throughout a Cox home. If you want even protection at every tap rather than only at one sink, whole-house RO is a strong option.
A correctly configured whole-house reverse osmosis installation includes prefiltration and the necessary controls to keep the membrane working reliably. Prefilters guard the membrane from sediment and chlorine, while the RO membrane handles the nitrate reduction; because RO also produces some wastewater and typically pairs with storage and delivery components, proper sizing and installation matter. Mr. Pure Water can evaluate your Cox home’s water and usage to recommend a whole-house RO system that fits your needs.