Nera Water

Information and details.

The waterworks deliver drinking water into every home. Thereby the strict legal regulations of the food law and the drinking water directive are guaranteed.

However, not always does the qualitatively immaculate drinking water reach the end user in his house. Often drinking water contamination due to microorganisms is the reason for limited usability of the resource water. Microbiological loads such as bacteria, viruses, fungi and spores in the drinking water installation system or in the drinking water treatment facilities often endanger the health of the inhabitants. Bacterial strains such as E. coli, Campylobacter, Salmonella, Legionella und Listeria as well as persistent biofilms, which can often be found in pipelines, are every once in a while, responsible for incidents in the drinking water as well as process water supply and in the food and beverage industry, respectively.

Big properties and apartment houses, hotels, hospitals and retirement homes as well as sports facilities, indoor aquatic centers and public or industrial objects are especially affected by such problems.

  • Fields of application

    Drinking Water Disinfection

    By specific, permanent dosing of smallest amounts of Nera Drinking Water into the drinking water, the water can permanently be kept germ-free.

    The application as well as necessary control procedures and dosing rates need to be metrologically controlled case-by-case and applied according to country-specific drinking water directives. The control procedures are in accordance with common industrial standards and comprise measurement parameters such as pH, ORP, FACs, conductivity and more.

    In contrast to common drinking water disinfection procedures a) the disinfection effect is enhanced by a metastable cocktail of highly oxidizing active constituents and b) no dangerous (toxic, flammable, explosive) basic components need to be handled.


    Degradation of Biofilms

    Biofilms are formed in aqueous systems if microorganisms start to colonize on boundaries. The biofilm itself consists, beside the therein living bacteria, of a hydrogel which is composed from water and extracellular polymeric substances (polysaccharides, proteins, lipids, nucleic acids) which the microorganisms themselves excrete. The slime-like matrix of the biofilms serves as protection, biosphere and culture medium for bacteria. Through metabolic activity in biofilms, corrosive processes of the substrates con be initiated and promoted, respectively. One talks about microbially influenced corrosion (MIC). The activity of sulphidogene bacteria especially needs to be mentioned in this regard.

    The process of biofilm formation (=Micro-Biofouling) as well as MIC can lead to high costs in private, commercial, public and industrial infrastructure. Therefore, there exists a high demand of procedures and active substance which can efficiently kill and decompose biofilms.

    Research has shown that microorganisms, which grow in biofilms, exhibit significantly higher resistances against most, to this date, known antimicrobial active agents. Methods, which avert formation of biofilms or kill and decompose existing biofilms, are in great demand.

    Many biocides and antibiotics need to be applied in large doses to deliver no more than moderate success concerning the fight against biofilms.

    These substances are often ecologically and toxicologically critical and little is known about the biological degradability of those biocides in natural water systems.

    For total killing and decomposition of biofilms with Nera Water only permanent dosing of the disinfecting liquid according to country-specific drinking water directives for drinking water disinfection is necessary. The cocktail of active agents of Nera products enters the biofilm, kills bacteria and leads – in contrast to common methods – to a total decomposition of biofilms.

    Furthermore, permanent dosing makes sure that no further build-up of biofilm is possible. It is, however, necessary that the decomposition of biofilm be accompanied metrologically since the dying and detaching of biofilm can temporarily lead to increased bacterial counts.

    The application as well as necessary control procedures and dosing rates need to be metrologically controlled case-by-case and applied according to country-specific drinking water directives.


    Fight against Legionella

    Legionella was first discovered in 1976 when participants of a congress of the American Legion in Philadelphia fell severely ill with an until then unknown bacteria named Legionella pneumophila. Out of 4000 participants, 182 fell ill with severe pneumonia and 29 deaths were registered.

    The disease became well known as legionnaires’ disease. The inhalation of pathogen-loaded, respirable aerosols was identified as the main path of infection. Therefore, especially showers but also aerosols from faucets pose safety hazards. Moreover, legionella progressively take on greater significance in pools where, next to whirlpools, systems such as artificial waterfalls, fountains and slides with water spraying or sprinkling tools play a bigger role. Furthermore, transfer of legionella is also possible via aerosols from cooling towers and air conditioning systems.

    Legionella normally live in water and grow ideally in warm conditions (e.g. hot water tank). The pipelines of bigger buildings such as hotel complexes, residential complexes, hospitals or public facilities offer excellent conditions for growth. Breeding places for legionella are biofilms for instance.

    They are preferably built up where large surface areas exist as for example in filters or on calcareous deposits, sludges or corrosion products. Within these biofilms, legionella are effectively protected from disinfectants by mucus that is produced by themselves.

    Nera Water efficiently fights build-up of legionella.

    The German drinking water directive (TrinkwV 2001), for instance, prescribes in its most recent valid version (March 10th 2016) a periodic duty to examine existence of legionella. This concerns all entrepreneurs and other owners of drinking water installations with large-scale plants for drinking water heating if the drinking water is used commercially and/or publicly and spraying or sprinkling of the water (e.g. showers) takes place.

    Hospitals, schools, kindergartens, hotels and foster homes for instance are regarded as public operators of large-scale plants for drinking water heating. These institutions are obliged that they are once in a year tested for legionella at several different, representative sampling points. Since 2011 there also exists an inspection obligation for other groups, among them owners/tenants of apartment buildings, housing associations and property management companies. These institutions are obliged to comply with examination intervals of 3 years.



    Nera Water can be used in the agricultural sector for

    1. water disinfection in pipes, reservoirs and drinking troughs
    2. biofilm removal in irrigation systems for plants and animals.#



  • Product properties

    Nera Water acts

    • bactericidal,
    • sporocidal,
    • fungizicidal (& levurocidal) as well as
    • virucidal.

    and removes biofilms.

    Nera Water acts

    • broadband
    • safe and fast as well as
    • without resistances.


    Nera Water is completely water-based and consists of around 99.5% water. It is environmentally friendly (ecologically harmless) and is 100% biologically degradable.

    Nera Water is

    • free from alcohol
    • free from aldehydes
    • free from phenols
    • free from solvents
    • free from fragrances
    • colorless
    • free from additives
    • antiallergic and
    • pH-neutral.


    The basic components, products as well as decomposition products are

    • ecologically and biologically harmless,
    • not flammable,
    • not explosive and
    • not dangerous to health.
  • Dosing & Application

    Dosing: see technical datasheet
    Kind of Application: Inline-Dosing
    Duration of Application: permanent; see technical datasheet

    With respect to the legal guidelines in Austria and Germany as well as technical product specifications please refer to the Technical Datasheets.

    With respect to questions concerning the product safety please refer to the product safety datasheet.

  • Range of products


    Content: C… Concentrate; W… Working solution