How is the drinking water quality of Jerusalem?

How is the drinking water quality of Jerusalem?

If you want to know more about the water source in Jerusalem and the process of testing the water quality laboratory at Gihon, please read on. You will also find information about how how to deal with water quality problems.

Water quality tests

Hagihon carries out chemical and microbiological tests - daily, monthly and periodically - via an authorized laboratory operated by the company, in order to ensure the high quality of the water it supplies to the city residents.

 

Carrying out the tests in practice every day, samples of water are brought to the laboratory, from various sampling points scattered across the city’s water system. The laboratory staff carry out tests of the water in order to define the level of chlorine, murkiness, chlorides, hardness, fluoride, reaction, coliforms, fecal coliforms and a general count of hetero-tropical micro-organisms.  Their findings of various chemical materials and also bacteriological tests are all subject to the drinking water regulations and the requirements of the Ministry of Health.

 

To be even more certain, the Hagihon laboratory carries out a larger number of tests than stipulated by the standard, in order to ensure an uncompromised quality for the water supplied to the city’s residents by the company.

 

The laboratory operated by Hagihon received a certificate of authorization (no. 034-2) from the Israel Laboratory Accreditation Authority. Indications: sampling, chlorine, murkiness, chlorides, hardness, fluoride, reaction, coliforms, fecal coliforms and a general count of hetero-tropical micro-organisms. The certificate testifies to professional worthiness and international recognition according to the ISO 17025 regulations. The tests in the laboratory include tests of water samples from the feeder pipelines (connecting sources), collecting pools and the urban pipeline network. The laboratory tests are carried out in accordance with the requirements of the public health regulations, drinking water’s sanitary quality, 1973-4 (combined version – 2000). The Israel Laboratory Accreditation Authority and the Ministry of Health oversee, with continuous supervision, the functioning of the Hagihon laboratory, in order to ascertain that it maintains a high level of functioning as obliged by the requirements of the authorization it received.

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Recent water analysis

In accordance with the Municipal Ordinance Amendment Law (No. 75), 2001, we hereby provide to the water consumers of Jerusalem details about the quality of the water supplied in Hagihon network (bacteriological tests):

 

Water Quality Periodic Report - Jerusalem

The reporting period: 1/4/2017 - 30/6/2017

Sampling points

The number of microbiological tests required by the regulations

Number of actual tests performed

Number of abnormal coliform results indicating contamination

Number of abnormal fecal coliform results indicating contamination *

Number of repeated tests

Number of abnormal results in repeated tests

Deviation percentage

Number of final normal tests

Reservoir

456

305

1*

0

1*

0

0.3*

304*

Supply network

456

516

3*

0

4*

2*

0.6*

513*

Feeding lines (Connections from Mekorot)

114

114

0

0

0

0

0

114

Total

570

935

4*

0

5*

2*

0.4*

931*

 

* The drinking water standard determines that the presence of one coliform bacteria or one fecal coliform in 100 ml of water sample is considered an abnormal result.

 

* One general abnormal coliform was found in May at Har Nof Pool, at point 203. The re-sampling was found to be normal. General coliform abnormalities - 3 consecutive times at Givat Shaul 11, at point 326 due to work carried out at this place. The fourth re-sampling was found to be normal.

 

Based on the results, the microbiological quality of the water provided for drinking during the above-mentioned period was very good and the water is potable.

 

A consumer interested in more details regarding the sanitary quality of the drinking water can read the report located at Hagihon customer service headquarters, Beit Ha'omot building, 101 Hebron Road, Jerusalem, Tel. 02-5651234.

 

Monthly update of water quality data can be found at www.hagihon.co.il

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