WaterQualityWatch -- Continuous Real-Time Water Quality of Surface Water in the United States

USGS is updating how statistical information is delivered. WaterWatch and WaterQualityWatch will be retired around February 24, 2026. Explore alternative tools and share feedback at wdfn@usgs.gov.

Real-Time Specific Conductance, in µS/cm

Map of , showing which states provide real-time computed water-quality data
420448121503100 14078260 14182500 11503000 14316460 14158798 453030122560101 14209710 453040123065201 14138870 14164550 14158850 14162500 14158790 14163150 452731123092100 452230122512201 14163900 14210000 14202980 14183020 14139800 14159500 11504115 14162200 420741121554001 14211720 11510700 14181500 14211010 14158500 14202650 11501000 14138900 11502500 14206241 14206752 14203500 14317450 14164900 11509370 11509500 14163000 14206950 14207200 14162440 14138720 11504260 14158740 14164700 142063398 422622122004000 422305121553800 14206694 423722120111500 420853121505501 444306122144600 422042121513100 453027122400000 14162450 421015121471800 453004122510301 432004118453400 420451121510000 420833121402000 421401121480900 423722120001400 422622122004003 420853121505500 422305121553803 431824118503600 432126118474400 421935121551200 11507501 422719121571400 452041119321500 420037121334100 422444121580400 Explanation

* Site operated on a seasonal basis or currently is not operating.
No values are available for the last 6 hours.

The "Real-time" map tracks short-term changes (over several hours) of water quality. Although the general appearance of the map changes very little from one hour to the next, individual sites may change rapidly in response to major rain events or to reservoir releases. The data used to produce this map are provisional.