1	Make Your Well Work Better Proper pump placement leads to: Better well health Fewer complaints Increased pump life
2	How Your Well Works I Air above water level Drawdown region: a nutrient-rich aerobic zone Region above active region: a movement zone Active region: the working zone Region below active region: a stagnant anaerobic zone
3	How Your Well Works II Standard well set-up with normal household usage (left) Standard well set-up after extended pumping (right)
4	How Your Well Works III Low yield well with normal household usage (left) Low yield well after extended pumping (right)
5	Make Your Well Work Better Cannot change the zone above the water level Maximize the drawdown zone Minimize the semi-stagnant zone above active zone Maximize the active zone: move the pump Minimize the stagnant anaerobic zone, if possible
6	The Well Yield Measurement is made after developing well Yield is measured in gallons per minute Mist and liquid components are measured separately and added together
7	Where to Place Your Pump Peak household usage method Open discharge method
8	Measure Pump Drawdown Peak Usage Method Measure static Pump peak usage for two hours Measure pumping level Determine pump drawdown Set pump at ¼ of drawdown below pumping level
9	Measure Pump Drawdown Peak Usage Method Example Static is 20’ Pump peak usage for two hours Pumping level 100’ Drawdown is 80’ ¼ of 80’ = 20’ 100’ + 20’ = 120’ 120’ pump setting
10	Measure Pump Drawdown Open Discharge Method Pump open discharge until water level stabilizes Measure pumping level Set pump at this level
11	Make Your Well Work Better
12	Pump Placement: Good & Bad Good examples and why Huffine Mill Road Kivette House Road Dunvagen Dr Questionable examples and why Middle School Deer Forest Dr Beeson Road
13	Huffine Mill Well has 59’ casing Well is 240’ deep Yield is 30 gpm Water zones @ 210’ and 225’ Static level is 9’ Pump is set @ 55’
14	Kivette House Well has 59’ casing Well is 100’ deep Yield is 60 gpm Water zones @ 75’, 80’ and 95’ Pump is set @ 80’ Static level is 55’
15	Dunvagen Dr Well has 54’ casing Well is 600’ deep Yield is 5 gpm Water zone @ 168’ Static level is 30’ Pump is set @ 550’ 2 hp 10 gpm pump
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17	Middle School Well has 145’ casing Well is 750’ deep Yield is 250 gpm Water zones @ 250’, 480’ and 745’ Static level is 36’ Pump is set @ 299’ 24 hr pump test tells the story
18	Beeson Road Well has 42’ casing Well is 850’ deep Yield is 102⁺ gpm Water zones @ 520’ and 840’ Static level is 30’ Pump (1½ hp) is set @ 600’ 600’ wire @ $1.50⁺ per foot
19	Deer Forest Dr Well has 42’ casing Well is 965’ deep Yield is 100⁺gpm Water zones @ 964’ Static level is 30’ Pump (1½ hp) is set @ 300’ The driller said 125’
20	"John Nykamp" John Nykamp, R.S. Environmental Health Program Specialist Guilford County Public Health Department 400 W. Market St Greensboro, N.C. 27401 (336)641-4807 (336)641-7613 FAX (336)641-3730 jnykamp@co.guilford.nc.us Well Contractor Certification Commissioner http://www.ncwelldriller.org/