Overview
Shannon WWTP is a primary treatment facility in Horowhenua District, New Zealand, serving approximately 1,573 people. It discharges 384.22 megaliters of treated wastewater annually.
Shannon WWTP is a municipal wastewater treatment plant located in Horowhenua District, within the Manawatū-Whanganui region of New Zealand's North Island. The facility serves a small population of around 1,573 residents, reflecting the rural character of the Shannon area. As a primary treatment plant, it provides basic physical treatment to remove settleable solids and reduce organic load before discharge. New Zealand's wastewater treatment plants operate under the Resource Management Act 1991 (RMA), which requires discharge permits (resource consents) to ensure environmental standards are met. For small communities like Shannon, primary treatment is common, though the regulatory framework encourages upgrades where receiving environments are sensitive. The plant's discharge volume of 384.22 megaliters per year indicates a modest flow typical of a small agglomeration. The treated effluent from Shannon WWTP is discharged into the local catchment, which ultimately drains to the Tasman Sea via the Manawatu River or nearby coastal waters. The region's waterways support diverse aquatic life, including native fish species, and the plant's discharge must comply with consent conditions to protect downstream water quality and ecological health.
Environmental context
The Shannon WWTP discharges into the local catchment within the Manawatū-Whanganui region, which drains to the Tasman Sea via the Manawatu River or adjacent coastal streams. The receiving waters support native fish species and aquatic ecosystems, and the plant's primary treatment level means that nutrient and pathogen removal is limited, placing importance on dilution and assimilation capacity. The area's agricultural land use may also contribute to diffuse pollution, making the plant's discharge a point source that requires careful management to avoid cumulative impacts on downstream water quality.
Frequently asked questions
Shannon WWTP is located on Johnston Street in Horowhenua District, Manawatū-Whanganui, New Zealand.
The plant serves approximately 1,573 people, reflecting the small community of Shannon and surrounding rural areas.
The plant discharges treated wastewater into the local catchment, which flows to the Tasman Sea via the Manawatu River or nearby coastal streams.
Shannon WWTP provides primary treatment, which involves physical processes to remove settleable solids and reduce organic load before discharge.
The plant operates under the Resource Management Act 1991 (RMA), which requires resource consents for discharges to ensure environmental standards are met. For small communities, primary treatment is typical, but upgrades may be required if the receiving environment is sensitive.
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