http://waterservices.usgs.gov/nwis/ivformat=waterml%2C1.1&sites=01646500[ALL:01646500]ALL[ALL:01646500][mode=LATEST, modifiedSince=null]methodIds=[ALL]2026-04-04T11:07:57.201Z890de900-3016-11f1-88da-2cea7f58f5caProvisional data are subject to revision. Go to http://waterdata.usgs.gov/nwis/help/?provisional for more information.vaas01POTOMAC RIVER NEAR WASH, DC LITTLE FALLS PUMP STA0164650038.94977778-77.12763889ST020700081005242403100010Temperature, water, °CTemperature, water, degrees CelsiusDerived Valuedeg C-999999.024.3AApproved for publication -- Processing and review completed.4.1 ft from riverbed (middle), [Discontinued]24.0AApproved for publication -- Processing and review completed.1.0 ft from riverbed (bottom), [Discontinued]23.9AApproved for publication -- Processing and review completed.7.1 ft from riverbed (top), [Discontinued]24.8AApproved for publication -- Processing and review completed.From multiparameter sonde, [Discontinued]16.8PProvisional data subject to revision.From multiparameter sondePOTOMAC RIVER NEAR WASH, DC LITTLE FALLS PUMP STA0164650038.94977778-77.12763889ST020700081005242403100060Streamflow, ft³/sDischarge, cubic feet per secondDerived Valueft3/s-999999.07490PProvisional data subject to revision.POTOMAC RIVER NEAR WASH, DC LITTLE FALLS PUMP STA0164650038.94977778-77.12763889ST020700081005242403100065Gage height, ftGage height, feetDerived Valueft-999999.03.69PProvisional data subject to revision.POTOMAC RIVER NEAR WASH, DC LITTLE FALLS PUMP STA0164650038.94977778-77.12763889ST020700081005242403100095Specific conductance, water, unfiltered, microsiemens per centimeter at 25°CSpecific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees CelsiusDerived ValueuS/cm @25C-999999.0406AApproved for publication -- Processing and review completed.7.1 ft from riverbed (top), [Discontinued]322AApproved for publication -- Processing and review completed.From multiparameter sonde, [Discontinued]299PProvisional data subject to revision.From multiparameter sondePOTOMAC RIVER NEAR WASH, DC LITTLE FALLS PUMP STA0164650038.94977778-77.12763889ST020700081005242403100300Dissolved oxygen, water, unfiltered, mg/LDissolved oxygen, water, unfiltered, milligrams per literDerived Valuemg/l-999999.09.1AApproved for publication -- Processing and review completed.From multiparameter sonde, [Discontinued]9.1PProvisional data subject to revision.From multiparameter sondePOTOMAC RIVER NEAR WASH, DC LITTLE FALLS PUMP STA0164650038.94977778-77.12763889ST020700081005242403100400pH, water, unfiltered, field, standard unitspH, water, unfiltered, field, standard unitsDerived Valuestd units-999999.08.4AApproved for publication -- Processing and review completed.From multiparameter sonde, [Discontinued]8.0PProvisional data subject to revision.From multiparameter sondePOTOMAC RIVER NEAR WASH, DC LITTLE FALLS PUMP STA0164650038.94977778-77.12763889ST020700081005242403163160Stream water level elevation above NAVD 1988, in ftStream water level elevation above NAVD 1988, in feetDerived Valueft-999999.040.73PProvisional data subject to revision.POTOMAC RIVER NEAR WASH, DC LITTLE FALLS PUMP STA0164650038.94977778-77.12763889ST020700081005242403163680Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 ±2.5°, formazin nephelometric units (FNU)Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)Derived ValueFNU-999999.06.2AApproved for publication -- Processing and review completed.From multiparameter sonde, [Discontinued]4.1PProvisional data subject to revision.From multiparameter sonde, [(2)]POTOMAC RIVER NEAR WASH, DC LITTLE FALLS PUMP STA0164650038.94977778-77.12763889ST020700081005242403199133Nitrate plus nitrite, water, in situ, mg/L as NNitrate plus nitrite, water, in situ, milligrams per liter as nitrogenDerived Valuemg/l as N-999999.01.61AApproved for publication -- Processing and review completed.SUNA, [Discontinued]0.83PProvisional data subject to revision.SUNA