Timberlane Water Hardness & Quality Report (2026)

Timberlane, Louisiana, in Jefferson Parish — a Jefferson Parish unincorporated community adjacent to Harvey and Marrero on the west bank of the Mississippi River near New Orleans — receives its water from the Jefferson Parish Water Department, drawing from the Mississippi River through the south Louisiana distribution.

The moderately hard 120.5 mg/L hardness and TDS of 272.3 mg/L reflect the Jefferson Parish supply's moderate lower Mississippi River character — the Cretaceous Selma Chalk and Quaternary Gulf Coast alluvium contribute calcareous mineral content from the lower Mississippi River's extensive Gulf Coastal Plain drainage (compare Harvey LA: 117/264 in Jefferson Parish comparable; Marrero LA: 123/281 in Jefferson Parish comparable; Timberlane consistent moderate from the same Jefferson Parish Mississippi River Cretaceous calcareous supply). The Mississippi River at Jefferson Parish — Cretaceous Selma Chalk (calcareous — primary hardness contributor), Quaternary Gulf Coast alluvium (calcareous — secondary contributor), and Holocene Mississippi River deltaic alluvium (calcareous — TDS contributor).

At 120.5 mg/L with TDS 272, Timberlane's water is moderately hard — mild scale buildup. Semi-annual descaling is appropriate. The PFAS level of 11.0 ppt is very high — a certified filter with PFAS removal is strongly recommended. Review the Jefferson Parish Water Department's annual water quality report.