Home

About No Name Key

History

About Solar

About Cisterns

About Sewers & NNK

NNK News

NNKPOA

Fact Sheet

Key Deer

the Key Deer Study

USFWS Refuge Comp Plan

See, Stay, Eat & Shop

Directions

Links

Contact

No Name Key

Home to the Endangered Florida Key Deer

What you need to know about Cisterns

THINK BEFORE YOU DRINK!
* CISTERNS ARE AN "OPEN WATER SYSTEM" SUBJECT TO CONTAMINATION.
* CISTERN WATER CANNOT BE “GUARANTEED” TO BE A SAFE SOURCE OF POTABLE DRINKING WATER.
* CISTERNS ARE APPROPRIATE FOR SECONDARY WATER USES SUCH AS WASHING CARS, WATERING PLANTS AND LAWNS, AND FLUSHING TOILETS.


USEPA 2002: “Cistern water is not for usage as drinking water”.

USEPA 2006: "Water obtained from a cistern is only for nonpotable uses, such as landscape watering. In other words: Do not drink it!"

FDEP: “A storm water catchment system for non-potable uses such as water lawns, flushing toilets, and washing cars” .

FKAA’s 2008:  Rainbarrel Handbook, “The quality of the water coming from your roof is great for plants.. but it is not fit for human consumption”.

CDC: “Private wells and cisterns pose the greatest public health risk.”  All cistern disinfection methods listed by the CDC failed to produce safe drinking water.


CENTER FOR DISEASE CONTROL:  Cistern Disinfection Methods

Disinfection Method

Disadvantages

Boiling

Requires a great deal of heat

Takes time to boil and cool

Water tastes stale

Typically limited capacity

Chlorine

 

Turbidity reduces effectiveness

Gives water a chlorine taste

May form disinfection by‑products

Does not kill Giardia or Cryptosporidium[1]

Requires careful handling and storage

Ultraviolet light

 

High electrical requirement

Provides no residual treatment

Requires pretreatment if turbid 

Requires new lamp annually

Effectiveness depends on the type of virus

Inconsistent to ineffective of protozoa

Iodine

 

Health side effects undetermined

Affected by water temperature

Gives water an iodine taste

Ozone

 

Ozone gas is unstable and must be generated at point of use

 

Filtering Devices:

 

(1. Ceramic filters

2. Carbon filters 3. Membrane filter, microfilter, ultrafilter,

nanofilter and

reverse osmosis

type devices)

 

Most bacteria and viruses will not be removed by filters

Microfilters may not remove viruses, especially from clear waters

Most carbon block filters do not remove pathogens

Can act as a growth medium for micro-organisms

Bacteria can grow in these systems contaminating the drinking-water



[1] A one-year sampling period, Crabtree et al, found that 26% of samples from cisterns were positive for Giardia cysts.

 


Water is a Human Right, not a Commodity
"The human right to drinking water is fundamental to life and health. Sufficient and safe drinking water is a precondition for the realization of human rights."
— United Nations 'General Comment' on the Right to Water.


On November 27, 2002, water was formally recognized as a human right for the first time when the United Nations Committee on Economic, Social and Cultural Rights adopted the ‘General Comment’ on the right to water, and described the State’s legal responsibility in fulfilling that right.  For the first time water is explicitly recognized as a fundamental human right and the 145 countries which have ratified the International CESCR will now be compelled to progressively ensure that everyone has access to safe and secure drinking water, equitably without discrimination.

WATER IS A HUMAN RIGHT:
The right to water is common to all beings and this right is a gift of creation, it is a natural right, a birth right. Common rights go hand in hand with common responsibility -- a common responsibility to conserve water, use it sustainably, and share it equitably. (U.N.)


The site is presented by a voluntary association of individuals working to develop a common resource of information on the Florida Keys.  Most information is taken from published articles and media reports already in the public domain but gathered here for your convenience. This information is being provided freely, and no kind of agreement or contract is created between you and the owners or users of this site. We cannot guarantee the validity of the information found here.  None of the contributors, administrators, or anyone else connected with this site in any way whatsoever can be responsible for the appearance of any inaccurate or libelous information or for your use of the information contained in or linked from these web pages.