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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]
US EPA, Pesticide Product Label, YYY DISINFECTANT, 07/17 ...2014-08-25
http://www.epa.gov/pesticides/chem_search/ppls/004959-00034...
... DEODORIZER Meets QSHA's Bloodborne Pathogens Act requirement Used
as directed, YYY DISINFECTANT is effective in hard water (up to 400 ...
US EPA, Pesticide Product Label, LONZAGARD RCS-128, 07 ...2014-08-01
http://www.epa.gov/pesticides/chem_search/ppls/006836-00347...
... Use] • [Effective in hard water up to 250 ppm hardness (calculated as
CaCO3) in the presence of 5% serum contamination] ...
[More results from www.epa.gov/pesticides/chem_search/ppls]
Water Softeners | WaterSense | US EPA2014-07-24
http://www.epa.gov/watersense/products/watersofteners.html
brief description of page
xml version="1.0" encoding="UTF-8"?><rss version="2.0" ...2014-08-29
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]
Sowing the Seeds for Healthy Waterways: How Your ...
http://www2.epa.gov/nutrientpollution/garden-documents
Garden Documents
Abstract for SETAC North America 32nd annual meeting ...
http://cfpub.epa.gov/si/si_public_file_download.cfm?p_downl...
... waters have been used to conduct chronic (>14-d) water-only or sediment
toxicity tests; including ASTM reconstituted hard water (with no addition ...
Toxicity Test Report Dated August 13, 1998 (Revised 1/22/99)2014-08-05
http://www.epa.gov/nrmrl/std/mwt/scitosci/434-NFCC-toxtest....
... Test Solution Aeration None Dilution Water Moderately Hard Water + Selenium
Endpoint Survival and Mean Dry Weight Test Acceptability ...
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]
xml version="1.0" encoding="UTF-8"?><rss version="2.0" ...2014-09-02
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 ...
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 ...
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 ...
Putting WaterSense® to Work, University Makes the Most of ...2014-08-21
http://www.epa.gov/watersense/docs/ci_casestudy_utaustin_50...
... However, UT Austin saw this as an opportunity to use water that otherwise
would go down the drain, as long as the hard water is treated prior to use ...
[More results from www.epa.gov/watersense/docs]
Actions You Can Take To Reduce Lead In Drinking Water ...
http://water.epa.gov/drink/info/lead/lead1.cfm
Actions You Can Take To Reduce Lead In Drinking 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 ...
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 ...

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