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Hard Water  Alkaline water containing dissolved salts that interfere with some industrial processes and prevent soap from lathering. Water may be considered hard if it has a hardness greater than the typical hardness of water from the region. Some textbooks define hard water as water with a hardness of more than 100 mgAL as calcium carbonate. -  From Drinking Water Technical & Legal Terms
  - Search all glossaries for terms containing hard water

US EPA - Standard Operating Procedure for Preparation of ...2014-01-07
http://www.epa.gov/pesticides/methods/atmpmethods/MB-30-00....
... Meade, MD Standard Operating Procedure for Preparation of hard water and
other diluents for antimicrobial products SOP Number: MB-30-00 ...
US EPA - OECD Quantitative Method for Evaluating ...2013-10-25
http://www.epa.gov/pesticides/methods/atmpmethods/MB-25-02....
... Preparation. f. Test substance diluent. The test substance diluent is 375
ppm hard water (unless otherwise specified). Adjust ...
[More results from www.epa.gov/pesticides/methods/atmpmethods]
Water Softeners | WaterSense | US EPA2014-05-22
http://www.epa.gov/watersense/products/watersofteners.html
brief description of page
Sowing the Seeds for Healthy Waterways: How Your ...
http://www2.epa.gov/nutrientpollution/garden-documents
Garden Documents
US EPA, Pesticide Product Label, ACCEL (CONCENTRATE) ...2013-12-20
http://www.epa.gov/pesticides/chem_search/ppls/074559-00004...
... of product per gallon of water), in the presence of 200 ppm hard water, 5%
serum load and 5 minute contact time, unless otherwise noted, this ...
US EPA, Pesticide Product Label, ZEP ATTACK HARD ...2011-04-14
http://www.epa.gov/pesticides/chem_search/ppls/001270-00226...
... DC 20460 1270-226 TERM OF ISSU NOTICE OF PESTICIDE,' .Q§(REG"
TRATOON o REREGISTRATION OF Zen ~ttack Hard Water Formulation r ...
[More results from www.epa.gov/pesticides/chem_search/ppls]
1998 Annual Report | Aluminum Toxicokinetics Oral ...2014-07-23
http://cfpub.epa.gov/ncer_abstracts/index.cfm/fuseaction/di...
... was empty. Half of the animals in each of these two groups received
the 26 Al in soft and half in hard water. Blood was ...
xml version="1.0" encoding="UTF-8"?><rss version="2.0" ...2014-03-14
http://blog.epa.gov/healthywaters/2013/03/water-savings-on-...
... Hard water softeners should also be, so that water using appliances can work
properly and there will be less problems of corrosion or leaks. ...
Water Savings on Tap for Fix a Leak Week 2013 | Healthy ...
http://blog.epa.gov/healthywaters/2013/03/water-savings-on-...
... Hard water softeners should also be, so that water using appliances can work
properly and there will be less problems of corrosion or leaks. ...
[More results from blog.epa.gov/healthywaters/2013/03]
Notification of Intent to Develop Draft Efficiency and ...2013-02-07
http://www.epa.gov/watersense/docs/water-softener_noi508.pd...
... Cation exchange water softeners are used to soften water by exchanging the
calcium and magnesium ions contained in hard water with sodium (or ...
Water | Region 2 | US EPA2010-10-05
http://www.epa.gov/region02/water/aquifer/catt/cattargs.htm
... hard). Seven of the ten sampling sites had very hard water, two had
hard water, and one had moderately hard water. Iron ...
Page 242 - WaterSense at Work2013-04-08
http://www.epa.gov/watersense/commercial/docs/watersense_at...
... Potable water used during other wash or rinse stages might. be treated with
a water softener to remove hard water, which can cause scale buildup. ...
Page 299 - WaterSense at Work2013-04-08
http://www.epa.gov/watersense/commercial/docs/watersense_at...
... otherwise would go. down the drain, as long as the hard water is treated.
prior to use in the cooling towers. Air Handler Condensate ...
[More results from www.epa.gov/watersense/commercial/docs]
APP-Hydraulic Fracturing Retrospective Case Study ...
http://www2.epa.gov/hfstudy/hydraulic-fracturing-retrospect...
GWERD Quality Assurance Project Plan. TASK No. 26278. QA ID No. G-16403.
Supplemental Recommendations | Pesticides | US EPA2012-04-06
http://www.epa.gov/oppad001/dis_tss_docs/dis-02.htm
... HARD WATER. The Recommended Methods may be modified to demonstrate
the effectiveness of an antimicrobial agent in hard water. ...
One in a Million | Superfund | US EPA2011-07-11
http://www.epa.gov/superfund/students/clas_act/spring/onemi...
... Water with a high percentage of such dissolved mineral salts is called
hard water. Hard water has a pH greater than 7 and ...
Auditing Antimicrobal Efficacy Studies2011-06-30
http://www.epa.gov/compliance/resources/policies/monitoring...
... requirements. The inclusion of hard water and/or organic soil load into the
test system are modifications that are frequently made. ...
xml version="1.0" encoding="UTF-8"?><rss version="2.0" ...2014-01-17
http://blog.epa.gov/blog/2009/12/science-wednesday-it%E2%80...
... descale existing plumbing,fixtures, boilers,chillers ets We add to this unit a
purification unit which kills bacteria,ecoli and makes hard water soft, bad ...
Ambient Water Quality Criteria for Chromium2009-03-02
http://water.epa.gov/scitech/swguidance/standards/upload/20...
... hard water was tested at 18°C and 3O'C (Academy of Natural Sciences of
Phil- adelphia, 1960). ... soft water and 135,000 pg/l in hard water. ...
When It Comes to Water, We Are All Close Neighbors ...
http://blog.epa.gov/science/2013/06/when-it-comes-to-water-...
... manganese that it's undrinkable. The hard water build-up or “scale”
also ruins hot water heaters. We have learned that ...

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