Search results | Search | US EPA

Advanced search

Results 1 - 20 of 3,220 for "hard water" within all areas of EPA.

Search for the terms hard AND water occurring separately.

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

Antimicrobial Testing Methods & Procedures: MB-30-00
Information about ATMP - SOP Preparation of hard water and other diluents for antimicrobial products - MB-30-00
Antimicrobial Testing Methods & Procedures: MB-22-03
Information about ATMP - SOP Disinfectant Product Preparation and Sampling Procedures - MB-22-03
[More results from]
Water Softeners | WaterSense | US EPA2016-02-10
brief description of page
Page 242 - WaterSense at Work2016-02-10
... 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 224 - WaterSense at Work2016-02-10
... osmosis and distillation systems, can also soften water. In a cation exchange
water softener, hard water with positively charged calcium and. ...
[More results from]
1998 Annual Report | Aluminum Toxicokinetics Oral ...2016-02-11
... 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 ...
'Greener' Surfactants from Bio-Based Waste as Efficient ...2014-01-14
... with improved properties for ensuring better cleaning efficiency of hydrophobic
dirt/soil, increase water solubility and improve stability in hard water. ...
[More results from]
US EPA, Pesticide Product Label, ACCEL (CONCENTRATE) DISINFECTANT CLEANER,01/19/20162016-01-20
... 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, KAY SOLIDSENSE SANITIZER,01/21/20162016-01-21
... Sanitizer is an effective sanitizer for use on food contact surfaces in 60 seconds
at 200 – 400 ppm active and up to 500 ppm hard water against: ...
[More results from]
Technical product bulletin: this surface washing agent is most effective on hydrocarbon and bio-organic soiling on hard surfaces including beaches, shorelines, and rocks; specifically to aid in the removal of oil and oil saturated soiling.
Acute Toxicity of Zinc to Rainbow and Brook Trout ...
... 0.76) and 2.5 (1.9 to 3.0) mg Zn/liter for rainbow and 2.0 (1.6 to 2.4) and 6.0
(5.0 to 7.0) mg Zn/liter for brook trout in soft and hard water, respectively ...
Research and Development: Health and Environmental ...
... hardness concentrations ranged from 10-13, 40-48, 160-180 and 280-320
mg/l as CaCO, for very soft, soft, hard and very hard water, respectively. ...
[More results from]
Notification of Intent to Develop Draft Efficiency and Performance Specifications for Cation Exchange Water Softeners2015-10-16
... Cation exchange water softeners are used to soften water by exchanging the
calcium and magnesium ions contained in hard water with sodium (or ...
PowerPoint Presentation2016-02-10
... spray force requirements • Inspect showerheads often and remove any scale
build-up from hard water Showerhead Efficiencies 20 Page 21. ...
[More results from]
OPPIN: Details for | Pesticide Labels | Pesticides | US EPA
Pesticide Product Label
Method 549.2 Determination of Diquat and Paraquat in Drinking Water by Liquid-Solid Extraction
This is a high performance liquid chromatography (HPLC) method for the \ndetermination of diquat and paraquat in drinking water sources and finished drinking water.
Ambient Water Quality Criteria for Lead2012-09-26
... demonstrating that daphnids were three times more sensitive to lead in soft
than in hard water (Table 1). ... bluegill in soft than in hard water. ...
... Dilution Water. For tests performed to meet NPDES objectives, synthetic,
moderately hard water should be used. The dilution ...
[More results from]
Your Input is Shaping the Clean Water Rule – EPA Connect
... We provide systems that naturally enhance water quality – be it hard
water or irrigated water or industrial or sea water. ...
Standardized Efficacy Study Report and Efficacy Study Summary
The study report form contains all of the required elements of a study report as found in 40 CFR part 160, and meets the requirements of PR Notice 2011-3. We encourage registrants to use this non-mandatory report format to facilitate the review process.
Didn't find what you were looking for? Try searching the EPA Archive.

Searches related to hard water

1 2 3 4 5 6 7 8 9 10 Next