Sewage Treatment Plant for Cities of the Jezreel Valley

Project details

The Project initiated, designed and managed by the Pilgei-Maim, within the general framework of cooperation with different municipalities in Jezreel Valley, on different projects.

Goals for the project:

  • Identification of sources of wastewater and effluents in the Jezreel Valley.
  • Creating a regional solution for all sewage flowing into the valley.
  • Construction of wastewater treatment plants to obtain the quality of the effluents required to enter the main reservoirs.
  • Utilizing existing irrigation water reservoirs for both containment and treatment of the effluents.
  • Implementing the plan by the shortest schedule possible.

Working method:

  • Cooperating with several municipalities to implement each of the sewage treatment plants.
  • Locating optimal locations for construction of each sewage treatment plant.
  • Reducing costs to the municipalities (the sewage sources) in order to make it easier for them to contribute to the project.
  • increase system reliability by Reducing operating costs.
  • Managing sewage flow to the reservoirs in order to reach the required settling time.
  • Establishing a management and operation company for the entire system.
  • Constructing a control system to manage the flow.

Stages of the project:

1990 – Planning stage – Presentation of master plan.

1992 – Completion of master plan. Beginning preparation of detailed plan.

1993 – Construction of the Tel-Adashim plant.

1995 – Beginning operation of the Tel-Adashim sewage treatment plant. Construction of the Ramat-Yishai sewage treatment plant.

1996 – Beginning operation of the Ginnegar plant – laying of first section.

1998 – Beginning operation of the Ha’Solelim plant.

1999 – Beginning operation of the Yokneam plant, operation of the Dovrat plant, and completion of pipeline segments.

2000 – Opening the pipe-line from Tel-Adashim to Yokne’am.

2001-2003 – Addition of sub-sectors to the main pipe-line.

2005 – Laying of the Israel Electric Company line connecting the sewage treatment plants to power.

2006 – Laying the section connecting Tel-Adashim pipe-line to Dovrat, completion of the. Zarzir sewage treatment plant, completion of the Ma’ale-Iron facility.

2008 – Installation of connection to the Alon-Tavor combined-cycle power plant project.

2010 – Construction of Ha’Sargel reservoir and connection to Ha’Sargel pipe-line.

Main sewage sources

Nazareth, Nazareth Illit, Migdal HaEmek, Yokneam, Ramat Yishai, Tivon, Jezreel Valley, Ilut, Reina, Ein Mahal Iksal, Nin, Maale-Iron, Megiddo Regional Council and Alon-Tavor “Tnuva” Dairy factory.

*Amount of wastewater as at 2015 is 17 million m3/year.

Active sewage treatment plants:

Name Daily flow (m3/day) Annual flow (m3/year)
Tel-Adashim 14,000 5.2
Ginnegar 9,000 3.2
Ha’Solelim 8,500 3.1
Yokneam, Tivon and Ramat-Yishai 7,200 2.6
Dovrat 4,800 1.7
Zarzir, Ma’ale-Iron, Ha’yogev 2,600 1.0
Tnuva Dairy Factory 3,600 (ביום עבודה) 1.0

Consumers of primary wastewater (for irrigation):

  • Jezreel Valley Water Association
  • Lower Galilee Water Association (“Mei Galil Tahton”)
  • Israel Electric Company
  • Tel-Ad (Tel Adashim) water association, Gazit water association, and others.

*40 reservoirs are connected to the project.


  • High quality effluents can be achieved, even with simple aeration pools.
  • It is possible to establish systems which provide an advantage to both the wastewater source (i.e. A city) and wastewater consumers (i.e. Farmers) without harming the environment.
  • Large systems, which are beneficial to both sides, can be well-funded when established in cooperation with many authorities and many farmers, provided that there is an administrative and coordinating system
  • Semi-intensive treatment facilities can function as planed for many years.
  • The amount of sludge accumulating in the facilities and the filtering rate are lower than expected.
  • Suspension of effluent a reservoir for at least 30 days drastically reduces the amount of pollutants.
  • Existing control systems make it possible to operate large systems, which can include several treatment facilities and dozens of reservoirs

Project info

Assigned workers

Client details

Client name

  • The Jezreel Valley Water Association
    Mei Galil Tahton water association
    Israel's Electric Company
    Tel-Ad Association (Tel Adashim)

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Project pictures

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