Vattenkvalitet

This document is applicable to ozone used for treatment of water intended for human consumption. It describes the characteristics of ozone, specifies tests methods for determining the ozone concentration in gases and determines rules for safe handling of the chemical ozone.

 This document specifies a method for the photometric determination of dissolved chromium(VI) using manual, e.g., hand photometry, or automated static, e.g., discrete analyser system, or automated dynamic techniques, e.g., flow injection analysis (FIA), continuous flow analysis (CFA), or ion chromatography with post-column derivatization (IC-PCR). The choice of the analytical technique to be used and needs-based sample preparation (e.g., matrix elimination) enables the determination of chromium(VI) in concentrations ≥0,02 µg/l in raw water, drinking water, surface water, aqueous eluates, cooling water and treated wastewater, provided that the Matrix does not contain any reducing substances. Typical areas of application for the static techniques as well as FIA and CFA are samples with chromium(VI) concentrations ≥2 µg/l. When using cuvettes with large optical path lengths, e.g. >100 mm, the range of application can be extended to concentrations <2 µg/l chromium(VI) (Annex A; Annex B; Annex C, Clauses C.1 and C.2). When using coupled techniques (e.g. IC PCR), chromium(VI) concentrations ≥0,02 µg/l can be determined (Annex C, Clause C.3). In some waters with reducing ingredients, chromium(VI) losses can occur just a few hours after sampling. Therefore, the method was not validated for leachate from landfills and raw sewage.

This document specifies and gives guidance on: - general requirements for storage of water outside consumers' buildings, including service reservoirs for potable water and reservoirs containing water not for human consumption at intake works or within treatment works, excluding those that are part of the treatment process; - design; - general requirements for product standards; - requirements for, quality control and auditing, testing and commissioning; - operational requirements; - requirements for inspection, rehabilitation and repair. The requirements of this document are applicable to: - the design and construction of new reservoirs; - the extension and modification of existing reservoirs; - significant rehabilitation of existing reservoirs. NOTE 1 It is not intended that existing reservoirs are to be altered to comply with this document, provided that there are no significant detrimental effects on water quality. NOTE 2 This document does not apply to reservoirs formed by the building of dams or the use of lakes for water storage purposes.

This document provides guidance on identifying and assessing impacts of climate change on wastewater systems and on developing strategies for the adaptation to these impacts. The assessment of the impacts is based on the assessment principles described in ISO 24566-1 Assessment Principles. This document also provides examples of some of the impacts of climate change on drinking water systems and of the responses that have been implemented by municipal water services or by the relevant jurisdiction (e.g., municipality or region served by the service). The examples of responses illustrate adaptation strategies that have been applied.

This document sets out key principles for the investigation of microplastics using thermo-analytical methods in water with low content of natural suspended solids. This document gives requirements for the standardisation of methods towards harmonized procedures for determination of microplastics contents.

This document is applicable to ozone used for treatment of water intended for human consumption. It describes the characteristics of ozone, specifies tests methods for determining the ozone concentration in gases and determines rules for safe handling of the chemical ozone.

This dcoument specifies a method for the determination of fluoro-, chloro-, bromo- and iodo-organic compounds (AOF, AOCl, AOBr, AOI). Due to the high solubility of AgF in water the scope of ISO 9562 is restricted to Cl-, Br- and I-organic compounds (AOX, calculated as chlorine) because of the applied argentometric detection. The PN follows the proven AOX ISO 9562 method: adsorption of organohalogen compounds on activated carbon, oxidative combustion at 1000 °C with following alterations: constant water feed during combustion (hydropyrolysis), absorption of combustion gases in water, halide specific detection using ionchromatography. The method is applicable for the determination of 2 µg/l AOF, expressed as F 10 µg/l AOCl, expressed as Cl 1 µg/l AOBr, expressed as Br 1 µg/l AOI, expressed as I. Samples for determination of AOF are treated differently than samples for the determination of AOCl, AOBr and AOI. - Samples for determination of AOF are not acidified. The adsorption takes place under unchanged pH conditions. Washing is also performed with a neutral washing solution. - Samples for the determination of AOCl, AOBr and AOI are adjusted to a pH value 2 with nitric acid, the adsorption and washing take place in a nitric acid environment.

This document contains requirements for dosing systems for chlorine dioxide generation according to the chlorite-chlorine gas process, the chlorite-acid process and the chlorite-sodium peroxodisulphate process, which are used for the disinfection and oxidation of substances in water. The chlorine dioxide (ClO2) solution is produced on site (in situ) by automated mixing of chemical precursors. This document applies to the treatment of water for human consumption, rinsing water for filters for swimming and bathing pools as well as for other uses (e.g. cooling water, process water, etc.

This document specifies requirements for storm water management systems on wastewater treatment plants. It does not refer to storm water management systems in wastewater collection and conveyance networks (sewer systems). This document specifies requirements for separation, storage, treatment, discharge and return of storm water within wastewater treatment plants. NOTE A storm water management system at the wastewater treatment plant is only required where such a system is not provided within the sewer system, limiting the flow to the wastewater treatment plants, see EN 752 and EN 16933 (all parts).

ISO 24521:2016 provides guidance for the management of basic on-site domestic wastewater services, using appropriate technologies in their entirety at any level of development.

ISO 24521:2016 supplements and is intended to be used in conjunction with ISO 24511. It includes the following:

· guidelines for the management of basic on-site domestic wastewater services from the operator's perspective, including maintenance techniques, training of personnel and risk considerations;

· guidelines for the management of basic on-site domestic wastewater services from the perspective of users;

· guidance on the design and construction of basic on-site domestic wastewater systems;

· guidance on planning, operation and maintenance, and health and safety issues.

The following are outside the scope of ISO 24521:2016:

· limits of acceptability for wastewater discharged into a receiving body;

· analytical methods;

· the management structure of sanitary waste/wastewater service activities of operation and management;

· the content of contracts or subcontracts.

ISO 24521:2016 is applicable to both publicly and privately operated basic on-site domestic wastewater (black and grey water) services, for one or more dwellings.