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Standards & Certifications — UV-C Applications

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Source: Official issuing-body catalogues and regulatory texts (DVGW, ÖNORM, EPA, NSF, ASHRAE, ISO, VDI, FDA, IEC, EUR-Lex, USP, BSI)

Standards & Certifications — UV-C Applications

A central reference for the standards and regulations that govern UV-C applications across drinking water, indoor air, cooling circuits, food processing, curing, radiation safety, and pharmaceutical use. Each entry states the issuing body, the scope, and where the standard is mandatory versus advisory.

Standard designations are kept in their original form so they can be looked up directly in the issuer's official catalogue (DIN, VDI, DVGW, ISO, IEC, NSF, EUR-Lex, EPA, FDA).

Drinking water

DVGW W294 (Germany)

  • Issuer: DVGW (German Technical and Scientific Association for Gas and Water).
  • Scope: UV disinfection systems for drinking water.
  • Parts:
    • W294-1: requirements for efficacy, equipment design, and testing.
    • W294-2: testing of disinfection efficacy (biodosimetry).
    • W294-3: requirements for radiation-sensing measurement devices.
  • Mandatory in Germany: yes, for feeding UV-treated water into the drinking water supply.
  • Minimum dose: 400 J/m² (= 40 mJ/cm²), referenced to 254 nm, as a conservative value intended to cover the relevant pathogens.
  • Type test: the manufacturer must have the reactor type tested.

The companion German standard DIN 19294-1:2020 specifies the type test for low-pressure UV disinfection devices. Since 2020, Germany, Austria, and Switzerland share a harmonised type plate for UV disinfection devices, established through DIN 19294-1:2020 and ÖNORM M 5873-1:2020.

ÖNORM M 5873 (Austria)

  • Issuer: Austrian Standards International.
  • Scope: devices for the disinfection of water using UV radiation — the Austrian counterpart to DVGW W294.
  • Current parts: M 5873-1:2020 (low-pressure lamp devices), M 5873-2:2003 (medium-pressure lamp systems), M 5873-3:2020 (reference radiometers).
  • France has declared ÖNORM M 5873 binding for drinking water UV installations.

EPA UVDGM (USA)

  • Issuer: US Environmental Protection Agency.
  • Document: Ultraviolet Disinfection Guidance Manual, issued in 2006 alongside the Long Term 2 Enhanced Surface Water Treatment Rule (LT2ESWTR).
  • For US public water systems; it is the basis for UV dose targets, reactor validation, and dose monitoring. It describes the biodosimetry procedure (MS2 phage as a surrogate organism).

NSF/ANSI 55 (North America)

  • Issuer: NSF International / American National Standards Institute.
  • Scope: ultraviolet microbiological water treatment systems, covering point-of-use and point-of-entry units. It defines Class A (disinfection) and Class B (supplemental treatment) performance criteria and is the common certification benchmark for UV water treatment products in the North American market.

Indoor air / HVAC

ASHRAE Standard 241-2023

  • Issuer: ASHRAE (American Society of Heating, Refrigerating and Air-Conditioning Engineers).
  • Title: Control of Infectious Aerosols — a standard for building ventilation aimed at reducing the risk of disease transmission, developed in response to the SARS-CoV-2 pandemic.
  • It defines the equivalent clean airflow that must be met by a combination of ventilation, filtration, and air cleaning during an "infection risk management mode". Air-cleaning options it addresses explicitly include duct-mounted UV, upper-room UV, and in-room portable systems.

ISO 16000-36:2018

  • Issuer: ISO.
  • Title: Indoor air — Part 36: Standard method for assessing the reduction rate of culturable airborne bacteria by air purifiers using a test chamber.
  • It provides the test-chamber method for evaluating UV-based and other air-cleaning technologies.

EN 16798-1:2019

  • Issuer: CEN (European Committee for Standardization); adopted in Germany as DIN EN 16798-1.
  • Scope: indoor environmental input parameters for the design and assessment of building energy performance, addressing indoor air quality, thermal environment, lighting, and acoustics. It is the basis for per-person ventilation demand calculations used in HVAC sizing.

Cooling circuits

42. BImSchV (Germany, 2017)

  • Issuer: German federal legislation (42nd Federal Immission Control Ordinance — Verdunstungskühlanlagen-Verordnung).
  • Scope: evaporative cooling systems, cooling towers, and wet scrubbers. It imposes a registration duty, monitoring duties, and Legionella threshold values.

VDI 2047 Part 2

  • Issuer: VDI (Association of German Engineers).
  • Title: Cooling towers — Securing hygienically sound operation of evaporative cooling systems (VDI cooling tower rules). It is the technical concretisation that operators follow to meet the hygiene requirements of the 42. BImSchV.

Food processing

FDA Juice HACCP (USA, 21 CFR Part 120)

  • Issuer: US Food and Drug Administration.
  • It requires a 5-log reduction of the pertinent pathogen in juice processing. UV light is an explicitly recognised control measure when the process is validated to consistently achieve that reduction.

USDA / FSIS

  • Issuer: US Department of Agriculture, Food Safety and Inspection Service.
  • Regulates meat and poultry products. UV-C may be applied as part of a validated intervention; the required log-reduction target depends on the product category and the specific FSIS performance standard.

ISO 22000:2018 (HACCP / Codex Alimentarius)

  • Issuer: ISO.
  • Title: Food safety management systems — Requirements for any organization in the food chain. It builds on the HACCP principles of the Codex Alimentarius General Principles of Food Hygiene. A UV-C step can be designated as a Critical Control Point (CCP) within an ISO 22000 food safety management system.

Regulation (EC) No 1935/2004 (EU)

  • Issuer: European Parliament and Council.
  • Scope: materials and articles intended to come into contact with food. It is relevant to UV lamp sleeves and any lamp envelope that may contact a food stream — such materials must comply with the framework regulation's safety requirements.

Curing

UV curing is a distinct field with its own process-control practice. There is no single widely recognised dosimetry standard analogous to DVGW W294 for water; instead, dose is monitored with calibrated radiometers and process-validation procedures specific to each line. Substrate- and adhesive-side specifications (UV-reactive chemistry, spectral match, layer thickness) are covered in the curing material references rather than by a single curing standard.

Radiation safety

ICNIRP guidelines (international)

  • Issuer: International Commission on Non-Ionizing Radiation Protection.
  • The ICNIRP 2004 guidelines set an occupational limit on the spectrally weighted effective (actinic) radiant exposure of the eyes and skin: it should not exceed 30 J/m² over an 8-hour working day, using the actinic action spectrum for weighting. At 254 nm the corresponding unweighted limit is in the order of 6 mJ/cm² per 8-hour day.
  • For shorter wavelengths around 222 nm, the exposure limits have been under active scientific review. Far-UVC penetrates living tissue far less than 254 nm radiation, which is why higher limits have been discussed — but the applicable value for any 222 nm installation should be checked against current published guidance rather than assumed.

IEC 62471 / EN 62471

  • Issuer: IEC; the European version EN 62471 is identical in content.
  • Title: Photobiological safety of lamps and lamp systems. It specifies the exposure limits, the reference measurement technique, and the risk-group classification scheme for incoherent broadband optical-radiation sources from 200 nm to 3000 nm.

Pharmaceutical / medical devices

USP <1231> (US Pharmacopeia)

  • Issuer: United States Pharmacopeia.
  • Scope: Water for Pharmaceutical Purposes. UV-C is commonly used as a microbial-control or ozone-destruction step within pharmaceutical water systems designed to this chapter.

European Pharmacopoeia (Ph. Eur.)

  • Issuer: European Directorate for the Quality of Medicines & HealthCare (EDQM).
  • The European counterpart to the USP for pharmaceutical water quality.

DIN EN ISO 14644 (cleanrooms)

  • Issuer: ISO; adopted in Germany as DIN EN ISO 14644.
  • Scope: cleanrooms and associated controlled environments. Part 1 (ISO 14644-1:2015) classifies air cleanliness by particle concentration. UV-C can be integrated into supply and exhaust air paths of pharmaceutical and electronics cleanrooms.

BS 8628:2022 (UK)

  • Issuer: BSI (British Standards Institution).
  • Title: Disinfection using ultraviolet radiation — efficacy testing of UV-C disinfection activities. It is the UK efficacy-test standard for UV-C disinfection devices.

Cross-references

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