Basin Water, Inc - Solutions

Avondale, Arizona

Treating Water High in Nitrate to Supplement Supply

City of Avondale
Avondale, Arizona
www.avondale.org

Basin Water 600 GPM Nitrate Removal System

Left to right:
Lee Lockridge,
Fred McWilliams, and
Jeff Mansfield.

Project: Basin Water 600 GPM Nitrate Removal System
Project: Basin Water 1,300 GPM Nitrate Removal System
Site Location: Well 8 and Well 8A

Executive Summary

With a long history of agriculture and farming, the city of Avondale began to experience nitrate contamination of groundwater from long term fertilizer use. Encountering a steady rise in nitrate levels coupled with increasing demand for groundwater, the city sought alternative methods of nitrate removal at its Well 8 site, which is located next to a new commercial development. Well 8 had a nitrate level of 13 mg/l as nitrogen, well in excess of the federal standard of 10 mg/l. In addition, it also had a sulfate level of 77 mg/l, which generally makes conventional nitrate removal very expensive.

After examining various treatment alternatives available in the market such as reverse osmosis and conventional ion-exchange, Avondale contracted with Basin Water for a turnkey 600 gpm high-efficiency ion exchange system, specifically designed and engineered for wellhead treatment in June 2003. The system was installed, permitted and operating by the end of July 2003 – less than 30 days after contract execution.

The Basin Water system operated 24 hours a day, seven days a week, providing roughly 1 mgd (3.8 ML/d) of drinking water. System downtime was minimal and treated nitrate levels were consistently below 8 mg/l as predicted, well below the state standard of 10 mg/L and produced a waste rate of approximately only 0.38%.

The City then drilled a higher capacity replacement well to replace well 8. This new well, well 8A, is designed to produce 2,000 gpm (126 L/s) and is used as a baseload well for the system. Based on Avondale's positive experience with Basin Water on well 8, the city contracted with the company to install a larger ion exchange system on the new well. The new Basin Water ion exchange system is used in conjunction with onsite blending to achieve a blended nitrate level of less than 8mg/l. Basin water is guaranteeing system performance and compliance through a long term ten (10) year contract.

Basin Water has provided Avondale with a reliable and economic solution for nitrate removal. As a result, the city has been able to commit to a long-term ten year contract with Basin Water to deliver safe, nitrate compliant drinking water to Avondale residents and customers.


Solutions
Case Studies > Arizona Water > Avondale > Baldy Mesa > Cal Water > Coachella Valley > East Valley > Hi-Desert > Pomona > SoCal Water Browse Solutions > By Contaminant > By Region > By Customer Avondale, Arizona Treating Water High in Nitrate to Supplement Supply City of Avondale Avondale, Arizona www.avondale.org Basin Water 600 GPM Nitrate Removal System Left to right: Lee Lockridge, Fred McWilliams, and Jeff Mansfield. Project: Basin Water 600 GPM Nitrate Removal System Project: Basin Water 1,300 GPM Nitrate Removal System Site Location: Well 8 and Well 8A Executive Summary With a long history of agriculture and farming, the city of Avondale began to experience nitrate contamination of groundwater from long term fertilizer use. Encountering a steady rise in nitrate levels coupled with increasing demand for groundwater, the city sought alternative methods of nitrate removal at its Well 8 site, which is located next to a new commercial development. Well 8 had a nitrate level of 13 mg/l as nitrogen, well in excess of the federal standard of 10 mg/l. In addition, it also had a sulfate level of 77 mg/l, which generally makes conventional nitrate removal very expensive. After examining various treatment alternatives available in the market such as reverse osmosis and conventional ion-exchange, Avondale contracted with Basin Water for a turnkey 600 gpm high-efficiency ion exchange system, specifically designed and engineered for wellhead treatment in June 2003. The system was installed, permitted and operating by the end of July 2003 – less than 30 days after contract execution. The Basin Water system operated 24 hours a day, seven days a week, providing roughly 1 mgd (3.8 ML/d) of drinking water. System downtime was minimal and treated nitrate levels were consistently below 8 mg/l as predicted, well below the state standard of 10 mg/L and produced a waste rate of approximately only 0.38%. The City then drilled a higher capacity replacement well to replace well 8. This new well, well 8A, is designed to produce 2,000 gpm (126 L/s) and is used as a baseload well for the system. Based on Avondale's positive experience with Basin Water on well 8, the city contracted with the company to install a larger ion exchange system on the new well. The new Basin Water ion exchange system is used in conjunction with onsite blending to achieve a blended nitrate level of less than 8mg/l. Basin water is guaranteeing system performance and compliance through a long term ten (10) year contract. Basin Water has provided Avondale with a reliable and economic solution for nitrate removal. As a result, the city has been able to commit to a long-term ten year contract with Basin Water to deliver safe, nitrate compliant drinking water to Avondale residents and customers.
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