Haloacetic Acids (HAA5)
To comply with the Stage 2 Disinfection Byproduct Rule, the rolling quarterly average for HAA5 at each sample site must be below .060 mg/L (60 ug/L).
To view sample results at each location, click "View Source Data" below the chart.
HAA5 Chlorine Maintenance Special Samples
The North Texas Municipal Water District conducts chlorine maintenance throughout the water delivery system in March each year. Starting in 2018, the City of Plano began collecting samples to analyze disinfection byproducts during this time period. Samples are collected from the same 12 sites normally sampled plus the four pump stations. In 2019, Plano started conducting special sampling twice during the maintenance period. In 2020, samples were collected from the inlet and outlet locations at all four pump stations to monitor changes inside tanks.