Mill Creek E.coli 2014

Transcription

1 Mill Creek E.coli 2014 Abbie Simmons Shilah Olson Wasco Co. Soil and Water Conservation District

2 Background Watershed Council started sampling for E.coli in Water quality sampling and monitoring on Mill Creek has been used to conduct reconnaissance and outreach in the community. There has been a total of 40 sites sampled.

3 E.coli There are two water quality standards that define acceptable levels of E.coli in Oregon: Acute: a single water standard cannot exceed 406 Organisms/ 100 ml Chronic: the geometric mean of five consecutive samples taken within a 30 day period cannot exceed 126 Organisms/ 100 ml

4 All Sites x y Station ID SITE DESCRIPTION LASAR ID MLC 0.3 2nd Street MLC 0.8 TDID pipeline bridge MLC th Street, MLC 1.7 Byers weather station SEC 0.0a Skyline tributary at mouth tribmlc 1.8 Pipe Discharge at 2401 Wright Street MLC 1.9 Wright Road WYG Whiskey Gulch at Mill Creek Road MLC 3.8 First Mill Cr Rd MLC 5.0 Second Mill Cr Rd MLC 5.6 Third NMLC N Fork Reservoir Rd SMLC S Fork Mill below Wicks 30173

5 All Sampling Sites

6 Sample Sites 2014 x y Station ID SITE DESCRIPTION LASAR ID MLC 0.3 2nd Street MLC 1.9 Wright Road MLC 5.0 Second Mill Cr Rd MLC 5.6 Third SMLC S Fork Mill below Wicks 30173

7 Sample Sites 2014

8 Turbidity (NTU) Site ID 30-Jan-14 4-Jun Jun-14 9-Jul Jul-14 6-Aug Aug-14 3-Sep Sep-14 9-Oct-14 6-Nov-14 MLC MLC MLC MLC SEC 0.0A TRIBMLC Turbidity MLC WYG MLC MLC MLC NMLC SMLC The measure of relative clarity of a liquid. Materials that cause water to be turbid include clay, silt, inorganic/organic matter, algae and other microscopic organisms. Measured by shining a light through the water and is reported in nephelometric turbidity units (NTU). Heavy rain events can cause higher levels of turbidity.

9 Specific Conductance 25 C) Sp.conductance Site ID 30-Jan-14 4-Jun Jun-14 9-Jul Jul-14 6-Aug Aug-14 3-Sep Sep-14 9-Oct-14 6-Nov-14 MLC MLC MLC MLC SEC 0.0A TRIBMLC MLC WYG MLC MLC MLC NMLC SMLC Specific conductance is a measure of the ability of water to conduct an electrical current. It is an important water-quality measurement because it gives a good idea of the amount of dissolved material in the water. Tributaries and the mystery pipe were consistently high, due to more runoff and likely from contributions from failed sewer systems.

10 2014 Raw Data Site ID 30-Jan-14 4-Jun Jun-14 9-Jul Jul-14 6-Aug Aug-14 3-Sep Sep-14 9-Oct-14 6-Nov-14 MLC > MLC > MLC > MLC SEC 0.0A > TRIBMLC 1.8 > > MLC WYG > > MLC MLC MLC NMLC SMLC Hwy > Skyline > TRIBMLC > E.coli MPN/dL ~ green cells indicate concentrations less than the chronic standard (126 MPN/ 100mL) ~ yellow cells indicate concentrations greater than the chronic standard but less than the acute standard (406 MPN/100mL) ~ red cells indicate concentrations greater than the acute standard

11 E. coli Concentrations in Mill Creek Mean Acute Standard nd Street, TDID pipeline bridge, 10th Street, Byers weather station Skyline tributary at mouth Pipe Discharge at 2401 Wright Street Wright Road Whiskey Gulch at Mill Creek Road First Mill Cr Rd Second Mill Cr Rd Sandoz N Fork Reservoir Rd S Fork Mill below Wicks

12 3000 E. coli Concentrations in Mill Creek Summer E. Coli Concentrations (MPN/100 ml) Mean Acute Standard nd Street, TDID pipeline bridge, 10th Street, Byers weather station Skyline tributary at mouth Pipe Discharge at 2401 Wright Street Wright Road Sample Sites Whiskey Gulch at Mill Creek Road First Mill Cr Rd Second Mill Cr Rd Sandoz N Fork Reservoir Rd S Fork Mill below Wicks

13 100 Mill Creek E. coli samples exceeding Acute Standard Percent of Samples Exceeding Standard nd Street, TDID pipeline bridge, 10th Street, Byers weather station Skyline tributary at mouth Mystery Pipe* Wright Road Whiskey Gulch* First Mill Cr Rd Second Mill Cr Rd Third * N Fork Mill below Wicks* S Fork Mill below Wicks

14 Next Steps Sample every other week during the summer Gather stream flow data. ODA s plan Ag Strategic Implementation Area Continue with same sites and schedule Questions???