Mullet Lake Tributary Monitoring Project
The water quality of Mullett Lake, located in northern Cheboygan County, Michigan, has been monitored for several decades, but little data exists for tributaries flowing into Mullett Lake. In 2005 the Mullett Lake Area Preservation Society contracted with Tip of the Mitt Watershed Council to monitor water quality in the Cheboygan River, Indian River, Little Sturgeon River, Pigeon River, and Mullett Creek. Monitoring has been conducted two times per year since 2005.
Water samples are collected for bacteriological and chemical analyses, physical water quality parameters are measured, and discharge data collected on the tributaries in the spring and fall of each year. Parameters monitored include: dissolved oxygen, pH, conductivity, temperature, total phosphorus, orthophosphates, total nitrogen, nitrate-nitrogen, chloride, fecal coliform bacteria and E. coli bacteria.
Using chemical constituent concentrations and discharge data, pollutant loadings and relative percentage contributions have been calculated for Indian River, Pigeon River, and Mullett Creek. Calculated pollutant loads were used to estimate nutrient load contributions from non-monitored watershed areas and combined with Cheboygan River load data to develop a simple nutrient budget.
Data collected thus far shows strong evidence of nutrient and bacteriological contamination occurring in the upper Mullett Creek watershed, which is probably a result of agricultural activity. Despite flowing through an urban area, this study has not exposed serious water quality problems in the Indian River. Surprisingly, relatively high nutrient loads and bacteria levels were documented in the Pigeon River, indicating there may be water quality issues in its watershed.
Results of this study make clear the need to adopt agricultural best management practices to protect and improve stream water quality, particularly in the Mullett Creek watershed. Groundwater nitrate concentrations in the Mullett Creek watershed should be monitored to safeguard public health and stormwater outlets should be monitored in Indian River to better assess urban impacts. Encouraging good riparian property management practices, throughout the watershed will benefit the water quality of Mullet Lake and its tributaries.
For detailed information, download the complete report (with data and maps) by clicking on this link: Mullett Lake Tributary Monitoring Report. (Please note the file size of this document is 762.5kb)