Presentation Title

Analyzing the Water Quality of Thompson Creek in Claremont, California

Faculty Mentor

Stephen Osborn

Start Date

23-11-2019 8:45 AM

End Date

23-11-2019 9:30 AM

Location

244

Session

poster 2

Type of Presentation

Poster

Subject Area

physical_mathematical_sciences

Abstract

Thompson Creek lies adjacent to a popular 5-mile hike that attracts a myriad of hikers and their dogs every weekend. An abundance of wildlife that resides in the San Gabriel Mountains takes advantage of this creek during wet seasons. The creek drains into the Thompson Creek Reservoir where runoff is collected to supply Claremont and other local cities with fresh water directly from the San Gabriel’s. Yet, there is little publicly available data assessing water quality necessary for protecting human health and water resources used for drinking. This study analyzes the water quality of Thompson Creek by collecting monthly water samples for elemental composition, alkalinity, and pH. pH ranged from 7.3 to 8.28 with pH values staying under an average of 7.51 as daily temperatures began to rise. Alkalinity ranged from 90 mg/L to 327 mg/L and throughout the sample period, alkalinity at each sample location rose as temperature rose and water began to evaporate as well. The Environmental Protection Agency (EPA) water regulation standards state that chlorine concentrations should be less than 4 mg/L. Yet, all chloride concentrations from the sample set range from 4.2 mg/L to 42.8 mg/L. Nitrate levels also exceeded EPA regulation standards of 10 mg/L or less with values that range from 0 mg/L to 21.8 mg/L. Fluoride and Barium complied with drinking water standards with Fluoride concentrations staying below 4 mg/L with a range from 0.8 to 1.9, and Barium concentrations staying below 1 mg/L with a range from 0.003 mg/L to 0.01 mg/L. No abundance of toxic chemicals was found in the sample set. Overall the water quality of Thompson Creek is suitable for public use and informing the public of the water quality will help ensure public health safety.

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Nov 23rd, 8:45 AM Nov 23rd, 9:30 AM

Analyzing the Water Quality of Thompson Creek in Claremont, California

244

Thompson Creek lies adjacent to a popular 5-mile hike that attracts a myriad of hikers and their dogs every weekend. An abundance of wildlife that resides in the San Gabriel Mountains takes advantage of this creek during wet seasons. The creek drains into the Thompson Creek Reservoir where runoff is collected to supply Claremont and other local cities with fresh water directly from the San Gabriel’s. Yet, there is little publicly available data assessing water quality necessary for protecting human health and water resources used for drinking. This study analyzes the water quality of Thompson Creek by collecting monthly water samples for elemental composition, alkalinity, and pH. pH ranged from 7.3 to 8.28 with pH values staying under an average of 7.51 as daily temperatures began to rise. Alkalinity ranged from 90 mg/L to 327 mg/L and throughout the sample period, alkalinity at each sample location rose as temperature rose and water began to evaporate as well. The Environmental Protection Agency (EPA) water regulation standards state that chlorine concentrations should be less than 4 mg/L. Yet, all chloride concentrations from the sample set range from 4.2 mg/L to 42.8 mg/L. Nitrate levels also exceeded EPA regulation standards of 10 mg/L or less with values that range from 0 mg/L to 21.8 mg/L. Fluoride and Barium complied with drinking water standards with Fluoride concentrations staying below 4 mg/L with a range from 0.8 to 1.9, and Barium concentrations staying below 1 mg/L with a range from 0.003 mg/L to 0.01 mg/L. No abundance of toxic chemicals was found in the sample set. Overall the water quality of Thompson Creek is suitable for public use and informing the public of the water quality will help ensure public health safety.