3.5 Organic Contaminants/Pollutants
The concentrations of organic pollutants should not exceed the values listed in Table (5)

Table (5) Organic Contaminants/Pollutants in Drinking Water

3.6 Byproducts of the Sanitization/Disinfection Process
The concentrations of the byproducts of the sanitation/disinfection process should not exceed the values listed in Table (6)

Table (6) Byproducts of the Sanitization/Disinfection Process

3.7 Radioactive Materials

The reference level for the radioactive properties of drinking water should be as listed in Table (7)
 

Table (7) Radioactive Materials in Drinking Water

3.8 Microbiological Properties
3.8.1 Bacteria

The 100ml representative water sample has to be free of:

a) Fecal Coliform Rods when using the filtration method or any other internationally approved method ,  and that the number of the Fecal coliform rods is less than 1.1 when using the “Most probable Number” method.

b)  Heat-Resistant Fecal Coliform rods or E. Coli when using the filtration method or any other internationally approved method ,  and that the number of the Fecal coliform rods is less than 1.1 when using the “Most probable Number” method.

3.8.2 Parasites Drinking water has to be free of all stages of the pathogenic parasites and infectious intestinal worms.

3.8.3 Free Living Organisms (Nematodes) The number of any stage of the stages of the free-living organisms (Nematodes) should not exceed 1 living organism per liter

4.Quality Control
The suitability of water for drinking and its compliance with the adopted health standards have to be verified/checked by the party owning the water project/enterprise, and it is obliged to conduct the necessary laboratory tests and to maintain official records of the results of those tests and to make them available for the governmental control agencies upon request. The tests have to be repeated, at least, according to the frequency explained in the following:

4.1 Microbiological Quality
4.1.1 Bacteriological Quality (Bacteria Indicative of Contamination)
4.1.1.1 Water For Drinking
The water is tested for Fecal Coliform Rods and for Heat-Resistant Coliform Rods or E. Coli according to the following frequency at least:

a) Protected underground water: 1 sample tested each month
b) Surface and underground water sources susceptible to contamination  tested at the rate of 1 sample/day (5 samples/week)
c)  Water distribution network according to the number of citizens served as follows:

4.1.1.2 Measures to be Taken when Contamination is Discovered in the First Sample
4.1.1.2.1 Contamination with Fecal Coliforms
At least two verification samples are collected from the same site with 1-hour interval between taking the samples. Pumping is stopped from and to the site if contamination appears in two out of three samples, and the necessary corrective measures are to be taken, and pumping is not resumed till after two samples, taken 1 hour apart, prove suitable.

4.1.1.2.2 Contamination with Heat-Resistant Coliforms or E. Coli

a) Carry a health survey to investigate the source of contamination
b) In the case the source of contamination is discovered, pumping from the source or network affected by the contamination is stopped, and efforts should be made to remove the contamination, and pumping should not be resumed till after water is proved to be suitable for two successive days at the rate of 1 sample/day
c) In case that the source of contamination is not determined, the scope and coverage of investigation should be expanded, and to test more samples from the neighboring area, and test two successive samples, taken 1 hour apart, from the same spot where the contamination appeared in the first time.
d) The site, from which the sample was collected, is considered to be contaminated/polluted if any of the two samples mentioned in © above tested positive for contamination. In this case, pumping is stopped from and to the site and is not resumed till after the causes of contamination are eliminated and two successive samples test to be suitable for drinking.4.1.1.3 Annual Assessment of the Water Networks
The efficiency of large networks, supplying 50 000 citizens or more, is assessed annually (I.e. a period of 12 months). Ratio of samples not conforming to the Bacteriological Quality Standards should not exceed 5 %, if it exceeds 5% corrective measures have to be taken to deal with the situation.

4.1.2 Biological Quality and Pathogenic Microbes
4.1.2.1    As need arises, water is tested for:
a) Pathogenic primates or intestinal worms
b)  Pathogenic intestinal bacteria

If contamination with any of the afore-mentioned pathogenic causes is confirmed, pumping is immediately stopped and two successive samples are to be taken, and pumping will not be resumed unless all samples prove to be free from contamination

4.1.2.2    Drinking water from surface sources is microscopically tested, to checked for free living organisms (Nematodes), at the rate of 1 sample/week.
If the number of living organisms (Nematodes) exceeded the permissible limit in any sample, six additional samples will be tested in three successive days at the rate of 2 samples/day, samples will be taken six hours apart. Pumping will continue if the number of samples conforming with quality is more than half the number of samples tested, and it is stopped if the number of samples that do not meet the requirements is more than half the total number of tested samples, and corrective action is taken. Pumping is resumed only after the number of samples conforming with quality is more than half the number of samples tested over three days at the rate of 2 samples/day, samples will be taken six hours apart.
 

4.2 Physical, Chemical and Radioactive Quality4.2.1 Cyclic Nature of Analysis (Frequency)
4.2.1.1 The First Group of Properties Listed in Tables 1 & 2, as well as the Nitrates and Nitrites from Table 3

a) New Sources and Sources That are Re-operated after a 6-Month Stoppage: Three samples are physically and chemically tested for the above-mentioned properties at intervals of 72 hours between successive samples, and the weighted average is considered when calculating the concentration of a property to illustrate the extent of conformity of the quality with the Standard before approving the source. Tests are repeated once every three months only for the first year.
b) Surface and Underground Water Sources Susceptible to Surface Contamination: The above-mentioned properties are tested at least once every three months
c) Protected Underground Sources: The above-mentioned properties are tested at least once every year

4.2.1.2    The Second Group of Properties Listed in Table 3 and Excluding Nitrates and Nitrites
a) New Sources and Sources That are Re-operated after a 1-year or more Stoppage: A sample is  physically and chemically tested for the above-mentioned properties to illustrate the extent of conformity of the quality with the Standard before approving the source. Tests are repeated once every six months only for the first year.
b) Surface and Underground Water Sources Susceptible to Surface Contamination: The above-mentioned properties are tested at least once every year
c) Protected Underground Sources: The above-mentioned properties are tested at least once every year, and if tests showed the stability of quality for these properties and its conformity with the requirements of the Standard for two successive years, then the above-mentioned properties shall be tested once every three years. On the other hand, if tests showed an unstable quality of the source concerning these properties, testing will go on annually.
 

4.2.1.3    The Third Group of Properties Listed in Table 6 “Byproducts of the Sanitation Process”

a) Free Chloride Surplus: Tested daily from the sources and networks
b) Chlorite: Tested daily from water treated with Chloride Dioxide
c) Total TriHalomethanes (TTHM): Total TriHalomethanes will be tested, at least once a week, in the networks fed from surface sources treated with chloride compounds Total TriHalomethanes will be tested, at least twice a year, in networks fed from underground sources susceptible to contamination
 

4.2.1.4    The Fourth Group of Properties “Pesticides and Organic Contaminants” Listed in Tables 4 & 5

Pesticides and Organic Contaminants will be tested once a year in surface and underground water susceptible for contamination

4.2.1.5    The Fifth Group of Properties “Radioactive Substances” Listed in Table 7 Alpha and Beta radionuclides will be tested once every two years for the water sources
4.2.2   Action Mechanism When the Standard is Exceeded
4.2.2.1    Physical and Chemical Properties Listed in Tables 1 & 2, as well as the Nitrates and Nitrites If any permissible level for any of the above-mentioned properties is observed, two daily verification samples will be tested successively concerning the color, taste, odor, turbidity and the Hydroxide number, and in two successive weeks for the remaining properties. If the weighted average for the three samples is within the permissible limits pumping will continue. If the weighted average is higher than the permissible limits pumping will continue while investigating the causes and dealing with them. However, if the weighted average for the last three samples is higher than the permissible limits pumping will be stopped and will not  be resumed till the concentration is within the maximum permissible concentration level after testing three samples within one week at two day intervals between samples.