Fluoride, chloride, and nitrate ion concentrations were determined for water samples collected from the Rio Grande and from nearby monitoring well sites along the river at five sampling dates encompassing the four seasons of the year through 2003-2004. Seasonal trends were evaluated and a student's t-test was used to analyze differences in anion concentrations upstream and downstream from the Albuquerque Southside Water Reclamation Plant (SWRP). While no seasonal trends were apparent, anion concentrations increased at samples sites downstream from the SWRP as compared with upstream samples in both surface and shallow ground water samples. Fluoride values ranged from 0.30 to 0.59 mg/l upstream and from 0.39 to 1.11 mg/l downstream from the SWRP. Chloride values ranged from 6.26 to 24.43 mg/l upstream and 21.47 to 80.21 mg/l downstream from the SWRP. Nitrate values ranged from 0.0 to 0.15 mg/l upstream and from 0.0 to 3.15 mg/l downstream from the SWRP. This is due in part to inputs of substantially higher anionic concentration from the SWRP into the river and subsequent movement into the shallow ground water.
Cliff Dahm, Chair Laura Crossey Bruce Thomson
Sewage disposal plants--Environmental aspects--New Mexico--Albuquerque., Water quality--New Mexico--Albuquerque Metropolitan Area--Statistics, Water--Pollution--New Mexico--Albuquerque Metropolitan Area., Water--Pollution--Rio Grande., Fluorides., Chlorides., Nitrates.
Stansifer, Gary. "Analysis of the mixing of treated effluent discharge, surface water and shallow ground water using anionic constituents." (2011). https://digitalrepository.unm.edu/wr_sp/20