There are many types of water filters that do many different things and filter many different things. Just putting in a water filter or because someone filters their water does not mean anything if you do not know what filters they use and what substances they may be filtering out. What specific type of filter is in use and exactly what does it do? And what method of purification is used – filters do not purify.
Most people think that in Mexico the only concern is drinking the water and immediately getting sick – sometimes known as Moctezuma’s Revenge (or Montezuma). There are also long term considerations when thinking about the water we drink – whether in Mexico or anywhere else in the world – including the US. Water can contain lots of things that are found naturally in the environment and that build up in our bodies over time that can cause serious harm – arsenic – lead – mercury among the “heavy metals”.
There are standards. There are specific things that can make you sick that can be filtered out. There is no way to know if the water you are getting in any kind of bottle or garafon or tap or wherever is safe to drink unless you carry test equipment around with you.
There is a great deal to be learned about water and I certainly do not claim to know much of anything. I buy filters that say they get rid of stuff. I installed an Ultra Violet System. I have a 10 micron sediment filter where we connect to the tap or spigot when we hookup. I have a 5 micron filter mounted inside our RV to filter all water entering the RV. I have a 0.5 micron coconut shell carbon filter for taste and odor under our sink. Only our drinking water goes through the UV and Carbon.
I make no recommendations or claims – I know nothing. Here is the tip of the iceberg of research about water…………
Arsenic in Private Well Water
http://www.mass.gov/eea/agencies/massdep/water/drinking/arsenic-in-private-well-water-faqs.html
http://www.cleanwaterstore.com
https://www.filtersfast.com/
https://www.filtersfast.com/P-Hydronix-SMCB-2510-Water-Filter.asp
http://www.nsf.org/services/by-industry/water-wastewater/residential-water-treatment/residential-drinking-water-treatment-standards . . . . . National Sanitation Foundation
While no federal regulations exist for residential water treatment devices, several voluntary national standards establish minimum requirements for the safety and performance of products used to treat home drinking water. These standards are generally divided according to the product’s technology.
NSF/ANSI 53: Drinking Water Treatment Units - Health Effects
NSF/ANSI 53 establishes the minimum requirements for the certification of POU/POE filtration systems designed to reduce specific health-related contaminants, such as Cryptosporidium, Giardia, lead, volatile organic chemicals (VOCs) and MTBE (methyl tertiary-butyl ether), that may be present in public or private drinking water.
http://www.wqpmag.com/not-all-filters-are-created-or-tested-equal . . . . Water Quality Association Magazine
The commonly tested chemical reduction claims for products seeking certification to NSF/ANSI Standard 53 are: heavy metals (arsenic, cadmium, chromium, copper, lead, mercury and selenium), inorganics (fluoride and nitrate plus nitrite) and volatile organic chemicals (chloroform surrogate as well as individual organic chemicals).
NSF/ANSI 42: Drinking Water Treatment Units - Aesthetic Effects
NSF/ANSI 42 establishes the minimum requirements for the certification of POU/POE filtration systems designed to reduce specific aesthetic or non-health-related contaminants (chlorine, taste, odor and particulates) that may be present in public or private drinking water.
NSF/ANSI 401: Emerging Compounds/Incidental Contaminants
NSF/ANSI 401 addresses the ability of a water treatment device to remove up to 15 individual contaminants (listed below), which have been identified in published studies as occurring in drinking water. While not a public health issue, the contaminants covered in NSF/ANSI 401 have been detected in drinking water supplies at trace levels and can affect some consumers’ perception of drinking water quality. (NSF/ANSI 401 also applies to reverse osmosis (RO) water treatment.)
Prescription Drugs
Meprobamate: a compound found in anti-anxiety drugs.
Phenytoin: an anti-epileptic drug.
Atenolol: a beta blocker drug.
Carbamazepine: an anti-convulsant and mood-stabilizing drug.
Trimethoprim: an antibiotic medication.
Estrone: a prescription birth control drug.
Over-the-Counter Medications
Ibuprofen: an over-the-counter pain reliever and anti-inflammatory medication.
Naproxen: an over-the-counter pain reliever and anti-inflammatory medication.
Herbicides and Pesticides
DEET (N,N-Diethyl-meta-toluamide): a pesticide and common active ingredient in insect repellents.
Metolachlor: an organic compound that is widely used as an herbicide.
Linuron: an herbicide often used in the control of grasses and weeds.
Chemical Compounds
TCEP (Tris(2-chloroethyl)phosphate): a chemical compound used as a flame retardant, plasticizer and viscosity regulator in various types of polymers including polyurethanes, polyester resins and polyacrylates.
TCPP (Tris(1-chloro-2-propyl) phosphate): a chemical compound used as a flame retardant.
BPA (Bisphenol A): a chemical compound used as a plasticizer.
Nonyl phenol: a collection of compounds often used as a precursor to commercial detergents.
NSF/ANSI 55: Ultraviolet Microbiological Water Treatment Systems
NSF/ANSI 55 establishes the minimum requirements for the certification of point-of-use/point-of-entry (POU/POE) ultraviolet (UV) systems and includes two optional classifications:
Class A systems (40 mJ/cm2) are designed to disinfect and/or remove microorganisms, including bacteria and viruses, from contaminated water to a safe level. Class A systems may claim to disinfect water that may be contaminated with pathogenic bacteria, viruses, Cryptosporidium or Giardia.
Reverse Osmosis (RO)
NSF/ANSI 58: Reverse Osmosis Drinking Water Treatment Systems
NSF/ANSI 58 establishes the minimum requirements for the certification of point-of-use (POU) reverse osmosis systems designed to reduce contaminants that may be present in public or private drinking water.
The scope of NSF/ANSI 58 includes material safety, structural integrity, total dissolved solids (TDS) reduction and other optional contaminant reduction claims. The most common optional claims addressed by NSF/ANSI 58 include cyst reduction, hexavalent and trivalent chromium reduction, arsenic reduction, nitrate/nitrite reduction, and cadmium and lead reduction.
http://www.discountfilters.com/blog/nsf-ansi-certification/
Water filters with a Standard 42 (aesthetic effects) certification are designed to minimize non-health related contaminants such as chlorine, taste and odor, and particulates. These filters sorted by classes of performance. For all other claims, there is only a pass or fail.
For taste & odor, the classes represent chlorine reduction efficiency:
Class I, a minimum of 75% chlorine reduction.
Class II, 50% reduction.
Class III, 25%.
For mechanical filtration, the classes represent particle size ranges that are removed with a minimum 85% efficiency:
Class I, ½ -1 micron.
Class II, 1-5 microns.
Class III, 5-15 microns.
Class IV, 15-30 microns.
Class V, 30-50 microns.
Class VI, 50+ microns.
It’s important to note a Class I or Class II rating does not imply cyst reduction. In order for a water filter to qualify for cyst reduction, it must have a 99.95 percent minimum filtration efficiency for 3-4 micron test dust particles, 3.000 micron micro-spheres, or live cryptosporidium oocysts.
Water filters with a Standard 53 (health effects) certification are meant to reduce health-related contaminants that may be present in public or private drinking water. Filters that meet the Standard 53 requirements are able to minimize exposure to microbiological, chemical or particulate contaminants that might be hazardous to your health. These types of filters are typically best suited for individuals who have well water.
Some filters fall under the scope of both above mentioned standards since they meet aesthetic and health related claims.
https://www.filtersfast.com/P-Pentek-FloPlus-10-Carbon-Block-Water-Filter.asp
Pentek FloPlus-10 Filter - 10" Carbon Block Filter
This Pentek FloPlus-10 is a 10 inch carbon block water filter replacement for use in many water filter systems, especially under sink water filter systems, reverse osmosis systems, and more. The Pentek FloPlus10 is a standard diameter filter (2 1/2" diameter) that maintains a relatively high flow rate despite its very low 0.5 micron rating. The Pentek FloPlus-10 is made specifically for applications where a low pressure drop combined with comprehensive depth filtration is needed. Able to withstand a maximum temperature of up to 180 degrees Fahrenheit, the FloPlus-10 can also be used in high temperature applications.
This advanced Pentek water filter replacement cartridge is specifically made to reduce the bad taste and odor of chlorine and other chemicals in water. It is a dual purpose water filter cartridge in that it also removes and reduces sediment, dirt, rust, sand, silt, limescale, and other common particulates. Additionally, the Pentek FloPlus10 removes 99.95% of harmful cysts such as cryptosporidium and giardia.
Pentek FLOPLUS-10 Filter Replacement Specifications:
Connection: Drop in
Temp. Range: 40 - 180 F
Initial Pressure Drop: 2 PSID
Micron Rating: 0.5 micron nominal
Filter Media: Modified molded carbon block
Dimensions: 9 3/4" length x 2 7/8" diameter
Gallons Per Minute: About 1-2 GPM flow rate depending on specific filter system
Filter Life: Approx. 6 months or 10,000 gallons depending on usage and local water quality
NOTE: after installation this cartridge should be flushed for about five minutes in order to remove remaining carbon fines
This Pentek FloPlus 10 water filter is also known by Pentek part number 455903-43 / 45590343. This filter has been tested and certified by NSF International to NSF / ANSI Standard 53 for the reduction of cysts.
Pentek P-250A Specifications:
Part Number: P-250A; 155832-44
Micron Rating: 0.5
Dimensions: 9-3/4"x2-1/2"
Meets NSF Standard: 42 and 53
Capacity: 500 Gallons
NSF/ANSI Certified Standard 42 and 53
Includes: 2 filters
Pentek P-250A reduces the following:
Cryptosporidium
Giardia
Cysts
Sediment
Bad taste and odor
Mercury
VOCs
Pesticides
Herbicides
Asbestos
The Hydro Life 310 replacement sediment water filter is so good we can not recommend it highly enough. Here is the deal. When tackling serious water issues in commercial and industrial equipment, 1 filter just isn't enough. You need a pre-filter and at least 1 post-filter. Sediment filters fall under the former and they play a crucial role in the water filtration processes. These filters capture larger debris like sediment and rust. If these pollutants reach your other filters that use KDF or carbon filtration media they can seriously reduce the effectiveness and life of those cartridges. The great news is this spun polypropylene sediment filter is not expensive and really does improve filter longevity and performance.
Hydro Life 310 Specifications:
Part Number: 310
Filter Media: Spun polypropylene
Dimensions: 2"x10"
MERV Rating: 2.5
Inlet/ Outlet Connections: 1/2" FPT
Filter Life: 3,000 gallons; 3~6 months (poor water quality can greatly diminish filter life)
Flow Rate: 10 GPM
Operating Pressure: 20-100 PSI Non-Shock
Operating Temperature: 33-100 F
NSF Test and Certified for Standard: 42 and 53
Usage: Ice machines, steamers, or other equipment
http://www.h2osplashwaterfilters.com/uvlite1ss.html
Ultraviolet Light (Sterilizer) - 1 GPM - Stainless Steel