A grand jury accused a former Nueces River Authority employee of falsifying water-quality reporting documents for multiple South Texas communities, leading to her arrest.
Authorities arrested Marisa Juarez on May 4 on charges of tampering with a governmental record. Investigators allege that Juarez knowingly submitted false microbial reporting forms intended to appear as legitimate government documents.
The indictment claims the alleged misconduct impacted the City of Corpus Christi water utilities laboratory, as well as the cities of Driscoll, Fowlerton, Jourdanton, Poth, Premont, and McMullen County between February and July 2024.
Water Testing Documents Under Investigation
According to court records, prosecutors allege that Juarez falsified microbial reporting forms connected to drinking water compliance monitoring. These reports are critical because the Texas Commission on Environmental Quality uses them to verify whether public water systems meet state and federal safety standards.
Microbial monitoring helps detect possible contamination pathways in water systems, including potential fecal contamination. As a result, officials treat reporting accuracy as an essential public health safeguard.
Investigators reportedly discovered irregularities after reviewing records that listed individuals as water sample collectors, even though those individuals did not personally complete the sampling.
Authorities filed the indictment in April. As of May 4, Juarez remained in the Nueces County Jail with bail set at $30,000.
Nueces River Authority Responds
The Nueces River Authority confirmed that Juarez no longer works for the agency.
Executive Director John Byrum declined to discuss personnel matters directly. However, he emphasized that the concerns appear to involve the validity of the documentation rather than the integrity of the agency’s water quality data.
Byrum previously addressed the controversy in a public statement posted on the authority’s website earlier this year. In the statement, he explained that the forms listed his name as the collector for water samples he did not personally collect.
He stated that he immediately launched an internal investigation after learning about the alleged discrepancies. Byrum also said the authority terminated the employee involved, reassigned responsibilities, and strengthened internal oversight procedures.
Internal Review and Compliance Changes
Following the investigation, the river authority implemented several procedural reforms designed to improve accountability and prevent future reporting problems.
According to the agency’s statement, officials completed a comprehensive internal review of field collection and reporting procedures. The authority also introduced new verification protocols for water-quality submissions and expanded oversight and employee training.
In addition, the organization increased transparency efforts while reinforcing compliance with state and federal regulations.
Byrum stressed that water security and public health remain the authority’s top priorities. He described the incident as disappointing but said it strengthened the agency’s commitment to professionalism, transparency, and accountability.
Broader Scrutiny Surrounds the River Authority
The arrest comes as the Nueces River Authority faces broader public scrutiny tied to its operations and leadership.
Earlier this year, the authority’s board selected an attorney to investigate allegations against Byrum. The allegations reportedly claim that officials presented inaccurate or overstated information to both the board and the City of Corpus Christi.
The investigation adds another layer of attention to the agency as it moves forward with one of the region’s largest planned water infrastructure projects.
Desalination Project Draws Regional Attention
The Nueces River Authority is currently developing a large seawater desalination facility near Port Aransas. Several regional entities, including the City of Corpus Christi, have already reserved future water supplies through paid agreements connected to the project.
Supporters argue that the desalination plant could help strengthen long-term water security across South Texas, especially during droughts and rising industrial demand. However, critics continue to question oversight and accountability as investigations surrounding the authority continue.
The criminal case against Juarez remains pending, and officials have not released additional details regarding potential impacts on water system compliance records.