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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
02323502 02319950 02358795 02234610 02323566 02320250 02319302 02239501 02319520 02322400 02326516 295323085151700 02235500 02327000 02258800 02322700 02234600 02326526 02292900 02289035 02310678 295308085143700 02322688 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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Page Last Modified: Mon 9 June 2014