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EVS-EN ISO 13647:2026
Water quality - Enumeration of culturable microorganisms - Colony count by spread plate inoculation on R2A medium (ISO 13647:2026)
Scope: This document specifies a method for the enumeration of culturable microorganisms in water by counting colonies on a low-nutrient agar culture medium by spread plate inoculation after incubation at 22 °C for 7 d.
This document is applicable to:
- water from the treatment process of public drinking water supplies (e.g. process water in the waterworks);
- chlorinated and non-chlorinated tap water in distribution systems and containers;
- bottled water;
- well water intended for human consumption.
For detailed information on the performance characteristics, see Annex B.
This document can be applied to other water matrices if the appropriate validation of performance of this method has been undertaken by the laboratory prior to use.
This document is applicable to:
- water from the treatment process of public drinking water supplies (e.g. process water in the waterworks);
- chlorinated and non-chlorinated tap water in distribution systems and containers;
- bottled water;
- well water intended for human consumption.
For detailed information on the performance characteristics, see Annex B.
This document can be applied to other water matrices if the appropriate validation of performance of this method has been undertaken by the laboratory prior to use.
Base documents: ISO 13647:2026; EN ISO 13647:2026
EVS-EN ISO 19127:2026
Geographic information - Geodetic register (ISO 19127:2026)
Scope: This document defines the structure, governance and management of the ISO Geodetic Register, in accordance with ISO 19135. This document also identifies the data elements applicable to geodetic referencing by coordinates, in accordance with ISO 19111.
Base documents: ISO 19127:2026; EN ISO 19127:2026
ISO 25549:2026
Fine bubble technology — Evaluation method for determining the shear viscosity of ultrafine bubble dispersions
Scope: This document specifies a method for evaluating the shear viscosity of ultrafine bubble (UFB) dispersions.
The method is based on any of the three measurement devices, namely parallel-plate rotational shear, cone-plate rotational shear and coaxial-cylinder rotational shear. The average effective shear viscosity of the ultrafine bubble dispersion is calculated from the measured stress (or strain rate) and the strain rate (or stress) applied to the sample. There are commercially available instruments based on these measurement methods in the market. This document applies to UFB produced using different methods of production.
The method is based on any of the three measurement devices, namely parallel-plate rotational shear, cone-plate rotational shear and coaxial-cylinder rotational shear. The average effective shear viscosity of the ultrafine bubble dispersion is calculated from the measured stress (or strain rate) and the strain rate (or stress) applied to the sample. There are commercially available instruments based on these measurement methods in the market. This document applies to UFB produced using different methods of production.
Base documents:
ISO 13647:2026
Water quality — Enumeration of culturable microorganisms — Colony count by spread plate inoculation on R2A medium
Scope: This document specifies a method for the enumeration of culturable microorganisms in water by counting colonies on a low-nutrient agar culture medium by spread plate inoculation after incubation at 22 °C for 7 d.
This document is applicable to:
water from the treatment process of public drinking water supplies (e.g. process water in the waterworks);
chlorinated and non-chlorinated tap water in distribution systems and containers;
bottled water;
well water intended for human consumption.
For detailed information on the performance characteristics, see Annex B.
This document can be applied to other water matrices if the appropriate validation of performance of this method has been undertaken by the laboratory prior to use.
This document is applicable to:
water from the treatment process of public drinking water supplies (e.g. process water in the waterworks);
chlorinated and non-chlorinated tap water in distribution systems and containers;
bottled water;
well water intended for human consumption.
For detailed information on the performance characteristics, see Annex B.
This document can be applied to other water matrices if the appropriate validation of performance of this method has been undertaken by the laboratory prior to use.
Base documents:
ISO 28902-4:2026
Air quality — Environmental meteorology — Part 4: Ground-based remote sensing of meteorological parameters by particle backscatter lidar
Scope: This document specifies the determination of height-resolved profiles of atmospheric backscattering by means of active optical sounding. The measurements allow the following properties of the atmosphere up to several kilometres above ground to be derived:
cloud bases;
upper boundaries of optically thin clouds;
upper and lower boundaries and internal structures of particle layers:
height of structures, e.g. inversions, boundary layer height, mixing layer height (under suitable conditions);
attenuated backscatter of the particles;
particle backscatter and extinction coefficients (requires further assumptions).
The document also addresses the depolarisation lidar and the use of multi-wavelength systems. This allows further parameters to be determined:
particle size classification (Ångström exponent, colour ratio);
shape classification (linear depolarisation degree).
The following fields of application are particularly important:
air quality monitoring (vertical structure of the boundary layer);
aviation safety (cloud base and visual range) (see ISO 28902-1[8]);
particle content and transport (e.g. volcanic dust);
weather forecasting and climate modelling (e.g. atmospheric boundary layer, cloud base, cloud microphysics);
satellite remote sensing (validation).
Examples that illustrate these applications are discussed in Annex A.
The benefits of scanning systems for parameters mentioned above are also discussed in Clause A.7.
In addition, particle backscatter lidars that measure at least two carefully selected wavelengths can be used to determine atmospheric gas concentrations. This is known as the differential absorption lidar “DIAL” technique. This technique is not part of this document and has been described in VDI 4210-1[12].
This document does not specify extended lidar techniques that monitor the following parameters quantitatively: inelastic scattering effects such as, Raman scattering, Doppler broadening, Doppler shift, multiple scattering, modulation techniques, and spectral separation of molecular and particle backscattering [high spectral resolution lidar (HSRL)]. Some of these extended techniques are or will be described in other parts of the ISO 28902 series.
This document does not address special features of airborne or satellite-borne systems.
cloud bases;
upper boundaries of optically thin clouds;
upper and lower boundaries and internal structures of particle layers:
height of structures, e.g. inversions, boundary layer height, mixing layer height (under suitable conditions);
attenuated backscatter of the particles;
particle backscatter and extinction coefficients (requires further assumptions).
The document also addresses the depolarisation lidar and the use of multi-wavelength systems. This allows further parameters to be determined:
particle size classification (Ångström exponent, colour ratio);
shape classification (linear depolarisation degree).
The following fields of application are particularly important:
air quality monitoring (vertical structure of the boundary layer);
aviation safety (cloud base and visual range) (see ISO 28902-1[8]);
particle content and transport (e.g. volcanic dust);
weather forecasting and climate modelling (e.g. atmospheric boundary layer, cloud base, cloud microphysics);
satellite remote sensing (validation).
Examples that illustrate these applications are discussed in Annex A.
The benefits of scanning systems for parameters mentioned above are also discussed in Clause A.7.
In addition, particle backscatter lidars that measure at least two carefully selected wavelengths can be used to determine atmospheric gas concentrations. This is known as the differential absorption lidar “DIAL” technique. This technique is not part of this document and has been described in VDI 4210-1[12].
This document does not specify extended lidar techniques that monitor the following parameters quantitatively: inelastic scattering effects such as, Raman scattering, Doppler broadening, Doppler shift, multiple scattering, modulation techniques, and spectral separation of molecular and particle backscattering [high spectral resolution lidar (HSRL)]. Some of these extended techniques are or will be described in other parts of the ISO 28902 series.
This document does not address special features of airborne or satellite-borne systems.
Base documents: