Water Well Journal

August 2016

Water Well Journal

Issue link: http://read.dmtmag.com/i/705618

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Page 11 of 71

age ack ting P LED Ligh Servic inch e W c TH A DU e or , F 9 7 e 19 Sinc ed on the er deliv o t tinue on c y he T tivit oduc o the pr t a or F . orldwide w i l ' h T E ORIGINAL Y ARY TAR AL RO e v otary drills ha s Dual R ' t mos e ormanc er perf t t omise of be pr tribution on c t significan e mak o or t a y of oper ofitabilit y and pr t s or t ac tr on c of number wing o gr d ill t t t b e . e s s s, orth T800W w Hy 50 T Elec w en m K 25 X 5 ummins IS C T 3 / 900 omp Air C Oiler ARD FEAT ANDA TA S en ilt Out asing v on C o RC T d T y e op Driv To C TURES tional/ or n e p Driv t ota R DR-24HD DR-12 OREMO F s simply no e' her T D DR-24 DR-40 T DR S O LINE-UP o drill. y t a er w t t be t Oiler clone Moun y C clone optiona y c ( g l) 4" 2 " DIA DR-24HD o learn mor To learn mor To learn mor 1.9190 .66 1.800 Cana ( D visit DR-40 e r f , visit e r ca/DR t. emos or f .S.A.) ada/U 5.5800 3.29 1.40 orldwide (Wo R e) e Industry NEWSLINE Corrosive Groundwater Suggests Action by Certain Well Owners to Check Potential Lead Threat S ince lead is harmful when consumed by both humans and animals, the National Ground Water Association urges residential water well users in regions where corrosive water levels have been detected to investigate and determine whether lead is present in their drinking water. NGWA issued this important call to action to supplement the release of research results released by the U.S. Geological Survey on July 13. The assessment of more than 20,000 wells nationwide indicates groundwater found in 25 states and the District of Columbia has a high potential for being naturally corrosive. The states with the largest percentage of wells with poten- tially corrosive groundwater are located primarily in the Northeast, the South- east, and the Northwest. The results can be found at http://water.usgs.gov/ nawqa/pubs/gw_corrosivity. Two indicators were used to assess the potential corrosivity of groundwater. The first index is the Langelier Satura- tion Index, an indicator of whether min- eral scale may form on the inside of pipes and prevent the release of lead to drinking water. The second indicator, the chloride-to-sulfate ratio, measures the potential of source water to promote the release of lead in pipes through galvanic corrosion. These two indicators were combined into one indicator to assess the preva- lence of potentially corrosive ground- water nationwide. NEWS continues on page 12 waterwelljournal.com 10 August 2016 WWJ Image courtesy USGS.

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