This Standard W 213-1 covers the principles of particle removal in the treatment of drinking water for public supply. It focuses on the removal of particles in the treatment of waters that may be susceptible to interference from surface waters, in particular river, lake, dam, spring, karst and fissure waters or water ob-tained from riverbank filtration. DVGW Series of Standards W 213 Part 3 through Part 5 describe water treatment methods that have been specifically designed for particle removal. DVGW Standard W 213-2 and DVGW Standard W 213-6, respectively, cover the assessment and application of granular filter media and the monitoring of water treatment methods for particle removal. This series of standards does not cover artificial groundwater recharge, which is described in DVGW Standard W 126 “Design, Construction and Operation of Plants for Artificial Groundwater Recharge for Drinking Water Abstraction”. Likewise, this Standard at hand does not cover processes aimed at e. g. adjusting the pH value of water or removing iron, manganese, organic substances or heavy metals. Such processes also employ the use of filters and can, in certain circumstances, run simultaneously with the particle removal process. These processes are covered in the DVGW Standard series W 223 (Removal of Iron and Manganese) and in DVGW Standards W 214-2 (pH Adjustment), W 239 (Organic Matter Removal) and W 249 (Re-moval of Heavy Metals).

W 1000 describes the requirements on water utilities in the area of the public water supply as regards their structural and process organisation. This standard W 1000 applies to water utilities that are active in the field of the public water supply. It stipulates the requirements on the qualification of the work force and the organisation of these companies as basis for a safe, dependable, environmentally compatible and economically efficient public water supply as defined by DIN 2000 and the statutory regulations. The requirements of this standard W 1000 apply equally to contracting parties commissioned by the water utility.

This standard W 551-2 applies to the operation and maintenance of drinking water installations in buildings. It stip-ulates the requirements on the management of technical and microbiological irregularities that may ad-versely affect hygiene in drinking water installations.

This Standard W 1003 relates to the piped supply of public water under normal operating conditions. Covering the different technical aspects and value-added steps, it provides an integral overview of how to describe, analyse and assess the resilience and security of supply in water supply areas.

This document ISO 17885 specifies the requirements for mechanical fittings for joining plastic piping systems for the supply of gaseous fuels, the supply of water for human consumption and other purposes, as well as for industrial application. It provides a unified set of test methods to check the performance of the fittings, depending on their intended use. It is the responsibility of the purchaser or specifier to select the appropriate fitting, taking into account their particular requirements and any relevant national guidance or regulations and installation practices or codes.

Forschungsbericht W 202011 07/2021 englisch

DVGW Information WATER No. 108 02/2021

GW 301 Technical Rule ‑ Standard 01/2021

For the purposes of this Standard GW 381, the term minimum requirements implies that further requirements can ensue from technical rules and legal provisions and/or that the ordering party may stipulate further requirements, in particular in the presence of special features or needs for protection or other constraints. The optional criteria shall, without claiming to be exhaustive, be considered guidance for the ordering party who shall decide on the need for further requirements. If a company consists of several units, this technical rule applies to the units in charge of underground construction and, without exception, to independent subsidiaries as well. A subsidiary shall be assumed to be independent if, in effect, it actually controls most operations and/or if the head office of the company is unable to provide the supervision of the staff and the construction sites as required.

This Standard W 110 intends to offer guidance for the beneficial use of geophysical logging measurements. It aims to help the user find the optimal combination of logging techniques for a defined task as early as in the concept phase of borehole surveys in vertical and, where due to design constraints, partially also in horizontal filter wells as well as in groundwater monitoring points. It is by no means a tool for evaluatingand interpreting geophysical measurements, a field that in the course of the last decade has evolved into an almost autonomous scientific discipline and, therefore, should be reserved for the relevant experts toengage in.This Standard applies to the design and execution of geophysical measurements in boreholes for groundwater exploration and abstraction in unconsolidated and consolidated rock, including well and groundwater monitoring point surveys. Drillings and probes used in near‑surface geothermal systems have a Special position in this context.

W 249 Technical Rule ? Standard 07/2012

W 202 Technical Rule ? Standard 03/2010

W 129 Technical Rule ? Standard 04/2012

W 127 Technical Rule ? Standard 03/2006

W 126 Technical Rule ? Standard 09/2007

This Code of Practice W 130 serves as a basis for the regeneration of wells and groundwater monitoring points. Ageing processes frequently compromise water well performance, adversely affecting, in turn, a wells service life and economic mode of operation. Well operators therefore face the dual challenge of having to identify the most appropriate regeneration methods for each specific case and being able to evaluate the success of the measures taken. Eventually, a direct capacity increase will ensure the economically efficient operation of a well over the long term only when combined with sustainably successful measures. Any well regeneration measures will, therefore, depend on the nature and scope of ageing and on the constructional condition of the well as well as on groundwater protection requirements. This Code of Practice describes the current requirements on the technically safe and hygienically flawless implementation of well regeneration measures, points out the causes of and explains how to identify well ageing processes, among other things, and offers suggestions on how to delay them. It additionally describes the application options and limits of both mechanical and chemical regeneration procedures and/or methods. By applying this Code of Practice, well operators and contractors alike will be able to record and trace the results achieved by the regeneration measures and evaluate their success, from the planning to the implementation and on to the final phase.