Periodic water quality sampling at LDEQ fixed monitoring stations along the Lower Mississippi River. Parameters include dissolved oxygen, pH, turbidity, nitrates, total suspended solids, and fecal coliform. Data used for Clean Water Act Section 305(b) assessment.

LDEQ Ambient Water Quality — Lower Mississippi River Monitoring Stations

Probabilistic 10-day river stage forecasts at NWS forecast point NORL1 (Carrollton Gage, New Orleans). Issued daily. Includes ensemble median, 10th, and 90th percentile traces. Used operationally for flood inundation and navigation planning.

NWS LMRFC — Mississippi River at New Orleans (NORL1) 10-Day Stage Forecast

Near-real-time operational status and discharge logs for the 24 major drainage pump stations operated by the New Orleans Sewerage & Water Board. Data includes pump on/off status, basin water levels, and estimated discharge capacity.

S&WB New Orleans — Drainage Pump Station Operational Logs

Flood inundation extents for the 1% annual chance (100-year) storm event across the Greater New Orleans metro area, derived from the USACE HEC-RAS hydraulic model suite. Includes depth grids and velocity rasters at 10-meter resolution.

USACE CEMVN — Greater New Orleans 1% Annual Chance Flood Inundation Map

Continuous 15-minute streamflow (cfs) and gage height (ft) at USGS station 07374000 on the Mississippi River at Baton Rouge. Period of record begins 1930. Real-time data available via NWIS.

USGS 07374000 — Mississippi River at Baton Rouge, LA — Streamflow and Stage

St. Tammany

Orleans

Pointe Coupee

East Baton Rouge

Acadia

Allen

Ascension

Assumption

Avoyelles

Beauregard

Bienville

Bossier

Caddo

Calcasieu

Caldwell

Cameron

Catahoula

Claiborne

Concordia

De Soto

East Carroll

East Feliciana

Evangeline

Franklin

Grant

Iberia

Iberville

Jackson

Jefferson

Jefferson Davis

La Salle

Lafayette

Lafourche

Lincoln

Livingston

Madison

Morehouse

Natchitoches

Ouachita

Plaquemines

Rapides

Red River

Richland

Sabine

St. Bernard

St. Charles

St. Helena

St. James

St. John the Baptist

St. Landry

St. Martin

St. Mary

Tangipahoa

Tensas

Terrebonne

Union

Vermilion

Vernon

Washington

Webster

West Baton Rouge

West Carroll

West Feliciana

Winn

Data Catalog