Research_CMP24

Assessing Nonpoint Nitrogen Contributions to the Texas Coastal Zones from Septic Systems

Population expansion along the Texas coast has led to the development of 63,000 septic systems (on-site disposal system [OSDS]) in the coastal zone. Faulty OSDSs that deliver high nitrate loads that can cause eutrophication, hypoxia, and red/brown tides-- all of which negatively impacts ecosystem stability and human livelihoods. As a result, Texas A&M University-- Corpus Christi is using research funds to accomplish all of the following:

1

Observe and Identify

Pollution identification from septic systems linked to the Texas Coastal Bend-- monthly observations of N species, N stable isotopes, anthropogenic tracers.

2

Collect and Quantify

The nitrogen loads leading into waterbodies (from OSDSs) are calculated using quarterly data from OSDSs and water usage. A quarterly survey of septic system and household water usage is also collected.

3

Assemble and Compare

Wastewater treatment plant effluent flux data and effluent concentrations (e.g. ammonium, nitrate) are collected and compared with the nitrogen loads from septic systems.

4

Educate and Present

Results of our research is disseminated to stakeholders and decision-makers in the form of data reports, raw data transfers, presentations, and peer-reviewed manuscripts. Eductaional workshops will be conudcted with the Mission-Aransas National Estuarine Research Reserve, Coastal Bend Bays and Esturaries Program, and Center for Coastal Studies to better communicate with the public.

5

Report

All reports, deliverables, and progress reports will be submitted to the Texas General Land Office in compliance with our funding contract.