| Water Level/Flow Parameters |
| |
Streamflow, ft³/s (534 sites) |
| |
Gage height, ft (65 sites) |
| |
Lake or reservoir water surface elevation above NGVD 1929, ft (9 sites) |
| |
Lake or reservoir water surface elevation above NAVD 1988, ft (6 sites) |
| |
Depth to water level, ft below land surface (369 sites) |
| |
Water level elevation above NAVD 1988, corrected for barometric pressure, ft (3 sites) |
| Water Quality Parameters |
| |
Temperature, water, °C (74 sites) |
| |
Specific conductance, water, unfiltered, µS/cm at 25 °C (53 sites) |
| |
Dissolved oxygen, water, unfiltered, mg/L (38 sites) |
| |
pH, water, unfiltered, field, standard units (36 sites) |
| |
Ammonia, water, filtered, mg/L as N (21 sites) |
| |
Ammonia plus organic nitrogen, water, unfiltered, mg/L as N (22 sites) |
| |
Nitrite plus nitrate, water, filtered, mg/L as N (22 sites) |
| |
Phosphorus, water, unfiltered, mg/L as phosphorus (22 sites) |
| |
Orthophosphate, water, filtered, mg/L as phosphorus (21 sites) |
| |
Chloride, water, filtered, mg/L (1 sites) |
| |
Chlorophyll, total, water, in situ, fluorometric, 650-700 nanometers, relative fluorescence units (RFU) (1 sites) |
| |
Chlorophyll a, estimated, water, in-situ, in-vivo fluorescence, RFU (2 sites) |
| |
Chlorophyll a, estimated, water, in-situ, in-vivo fluorescence, concentration estimated from reference material, µg/L (2 sites) |
| |
Phycocyanins (cyanobacteria), water, in situ, fluorometric method, excitation at 590 +-15 nm, emission at 685 +-20 nm, µg/L (2 sites) |
| |
Phycocyanins (cyanobacteria), water, in situ, fluorometric method, excitation at 590 +-15 nm, emission at 685 +-20 nm, relative fluorescence units, RFU (3 sites) |
| |
Chlorophyll, total, water, fluorometric, 650-700 nanometers, in-situ sensor, µg/L (1 sites) |
| |
Ammonia, water, dissolved, pounds per day as nitrogen (21 sites) |
| |
Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +/-2.5 degrees, FNU (19 sites) |
| |
Chloride, water, dissolved, tons/day (1 sites) |
| |
Suspended sediment concentration, mg/L (91 sites) |
| |
Suspended sediment discharge, tons/day (91 sites) |
| |
Phosphorus, water, unfiltered, short tons of phosphorus per day (21 sites) |
| |
Phosphorus, water, unfiltered, pounds per day (1 sites) |
| |
Ammonia plus organic nitrogen, water, unfiltered, pounds of nitrogen per day (21 sites) |
| |
Orthophosphate, water, dissolved, pounds per day (21 sites) |
| |
Nitrite plus nitrate, water, dissolved, lb/d as N (21 sites) |
| |
Cyanobacteria (blue-green algae), YSI in-vivo fluorescence of phycocyanin, excitation - 595, emission - 650 nm, cells/mL (1 sites) |
| |
Nitrate plus nitrite, water, in situ, mg/L as N (3 sites) |
| |
Turbidity, water, unfiltered, broad band light source (400-680 nm), detection angle 90 +/- 30 degrees to incident light, nephelometric turbidity units (NTU) (1 sites) |
Daily data pages will be decommissioned in early 2026.