Baker Water Hardness & Quality Report (2026)

Baker, Louisiana, in East Baton Rouge Parish — an East Baton Rouge Parish city adjacent to Baton Rouge and Zachary in south-central Louisiana — receives its water from the Baker Water System, drawing from the Mississippi River (East Baton Rouge Parish) through the Baton Rouge area distribution.

The moderately hard 122 mg/L hardness and TDS of 277.8 mg/L reflect the south-central Louisiana East Baton Rouge Parish Mississippi River supply's moderate calcareous character — reflecting the Mississippi River's accumulated calcareous dissolved content from the upper drainage basin's calcareous formations, blended with the Lower Mississippi Valley alluvial input. The Mississippi River at East Baton Rouge — Cretaceous calcareous formations (upper basin — calcareous, hardness contributor), Quaternary Lower Mississippi Valley alluvium (slightly calcareous — secondary contributor), and Tertiary Gulf Coastal Plain sediments (slightly calcareous — TDS contributor).

At 122 mg/L, Baker's water is moderately hard — scale builds in kettles and appliances over months, dishwashers benefit from rinse aid, and faucet aerators need periodic cleaning. Quarterly descaling is appropriate. The PFAS level of 11.1 ppt warrants a certified reverse osmosis drinking water filter — the East Baton Rouge Parish south Louisiana industrial-petrochemical corridor and Barksdale Air Force Base (Bossier Parish — AFFF, regional) contribute significantly to Baker's very elevated readings.