La Marque, Texas’s Home for
Water Softeners, Water Filters,
& Water Delivery

Yes. La Marque’s drinking water meets federal and state drinking water standards.

Hardness levels were not specifically listed in the report. However, La Marque water is often considered moderately to hard, especially when groundwater wells are used as a backup source. These sources can contain higher levels of dissolved minerals like calcium and magnesium.

La Marque’s water quality report does not include specific PFAS testing results. However, the EPA is in the process of setting new maximum contaminant levels (MCLs), which range from 4 to 10 parts per trillion, equal to 0.00000000004 for PFOA and PFOS individually, and up to 0.0000000001 for PFNA, PFHxS, and HFPO-DA (GenX Chemicals). While PFAS are not reported here, additional filtration can help address potential emerging contaminants. Click here to learn more about our whole house PFAS filtration systems.

Yes. Fluoride is present in La Marque’s water supply at levels around 0.2 ppm. This is below the EPA maximum contaminant level of 4.0 ppm.

La Marque’s water supply primarily comes from surface water purchased from the Gulf Coast Water Authority (GCWA), which sources water from the Brazos River. The city also maintains deep groundwater wells that can be used in emergency situations when surface water supply is unavailable.

Water supplied by the GCWA is treated using advanced filtration and disinfection processes before reaching La Marque customers. When groundwater wells are used, the water is disinfected but may contain higher mineral content since it is not filtered in the same way. Chlorine and chloramine are used as disinfectants to control microbial contaminants, and the system is monitored for byproducts such as total trihalomethanes (TTHMs) and haloacetic acids (HAA5), which remain within regulatory limits.

Many homeowners in La Marque choose additional water treatment due to mineral content, taste, and overall water quality considerations. The report shows the presence of disinfection byproducts, nitrate, and chlorine residuals, along with occasional use of groundwater sources that may increase hardness. A monitoring violation related to coliform sampling and a reported water loss of approximately 45% may also raise concerns about system consistency. A water softener can help reduce scale buildup and extend the life of plumbing and appliances, while filtration systems can improve taste, odor, and clarity. Reverse osmosis or whole-home filtration systems can provide added peace of mind.

La Marque conducts routine water quality monitoring in compliance with state and federal requirements. This includes testing for inorganic contaminants such as nitrate, fluoride, and barium; disinfection byproducts like TTHMs and HAA5; chlorine residual levels; and lead and copper from household plumbing. The system is also monitored for coliform bacteria and overall treatment performance.

You can access the most recent La Marque Tap Water Quality Report here.