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

Real-Time Nitrate, in mg/L as N

Map of , showing which states provide real-time computed water-quality data
05554300 05576195 03339000 05447500 03346500 07020850 05420500 03343820 05586300 05465500 05543010 05576100 03336890 05446500 03381495 05599490 05595000 05579610 05579620 05579624 03612600 05579630 411955088280601 05575550 Explanation

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

The nitrate measurement is actually nitrate plus nitrite. Nitrite absorbs strongly at wavelengths similar to nitrate, and is not explicitly accounted for in the nitrate calculations by the sensors. For practical purposes, the concentration of nitrite is usually negligible in surface waters and has little effect on reported nitrate concentrations.

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.

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URL: http://waterwatch.usgs.gov/wqwatch/map?state=il&pcode=00630
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Page Last Modified: Mon 9 June 2014