Housing Health and Safety Rating System (HHSRS)
Examples of the 29 hazards
Each hazard is identified with a brief description of the hazard and the most vulnerable group identified.
1. Damp & Mould Growth
Caused by dust mites, mould or fungal growths caused by dampness and/or high humidity. It includes threats to mental health and social well-being caused by living with damp, damp staining and/or mould growth.
Most vulnerable: 14 years or less
2. Excess cold
From sub-optimal indoor temperatures.
Most vulnerable: 65 years plus
3. Excess Heat
Caused by excessively high indoor air temperatures.
Most vulnerable: 65 years plus
4. Asbestos and Manufactured Mineral Fibres
Caused by exposure to asbestos fibres & manufactured mineral fibres (MMF).
Most vulnerable: No specific group
5. Biocides
Threats to health from those chemicals used to treat timber and mould growth in dwellings. Insecticides and rodenticides to control pest infestations (e.g., cockroaches or rats and mice), these are not considered for the purpose of the HHSRS.
Most vulnerable: No specific group
6. Carbon monoxide and fuel combustion products
Hazards due to excess levels of carbon monoxide, nitrogen dioxide, sulphur dioxide and smoke in the dwelling's atmosphere.
Most vulnerable: No specific group
7. Lead
Threats to health from the ingestion of lead.
Most vulnerable: Under 3 years
8. Radiation
This category covers the threats to health from radon gas and its daughters, primarily airborne, but also radon dissolved in water. While rare, leakage from microwave ovens might also be considered. Evidence of health risks from low-level exposure to electro-magnetic fields from phone masts have not, to date, been proven.
Most vulnerable: All persons aged between 60 and 64 years who have had lifetime exposure to radon.
9. Uncombusted fuel gas
The threat of asphyxiation due to fuel gas escaping into the atmosphere within a dwelling.
Most vulnerable: No specific group
10. Volatile organic compounds
Volatile organic compounds are a diverse group of organic chemicals, which include formaldehyde, that are gaseous at room temperature and are found in a wide variety of materials in the home.
Most vulnerable: No specific group
11. Crowding and space
Health hazards linked to a lack of living space for sleeping and normal family/household life.
Most vulnerable: No specific group
12. Entry by intruders
Problems keeping a dwelling secure against unauthorised entry and the maintenance of defensible space.
Most vulnerable: No specific group
13. Lighting
Threats to physical and mental health linked to inadequate natural and/or artificial light. It includes the psychological effect associated with the view from the dwelling through glazing.
Most vulnerable: No specific group
14. Noise
Threats to physical and mental health caused by noise exposure inside the dwelling or within its curtilage.
Most vulnerable: No specific group.
15. Domestic hygiene, pests, and refuse
Health hazards due to poor design, layout, and construction to the point where the dwelling cannot be readily kept clean and hygienic; access into, and harbourage within, the dwelling for pests; and inadequate and unhygienic provision for storing and disposal of household waste.
Most vulnerable: No specific group
16. Food safety
Threats of infection due to inadequate facilities for the storage, preparation, and cooking of food.
Most vulnerable: No specific group.
17. Personal hygiene, sanitation, and drainage
Threats of infection and threats to mental health associated with personal hygiene, including personal washing and clothes washing facilities, sanitation, and drainage. Most vulnerable: Children under 5
18. Water supply
The quality and adequacy of the water supply for drinking and for domestic purposes such as cooking, washing, cleaning and sanitation. Also threats to health from contamination by bacteria, protozoa, parasites, viruses, and chemical pollutants. Most vulnerable: No specific group.
19. Falls associated with baths etc
Falls associated with a bath, shower, or similar facility.
Most vulnerable: 60 years plus
20. Falling on level surfaces etc
Falls on any level surface such as floors, yards, and paths. It also includes falls associated with trip steps, thresholds, or ramps, where the change in level is less than 300mm.
Most vulnerable: 60 years plus.
21. Falling on stairs etc
Falls associated with stairs, steps, and ramps where the change in level is greater than 300mm. It includes falls on internal stairs or ramps within the dwelling, internal common stairs or ramps within the building, access to the dwelling, and to shared facilities or means of escape in case of fire. It also includes falls over guarding (balustrading)
Most vulnerable: 60 years plus.
22. Falling between levels
Falls from one level to another inside or outside a dwelling, where the difference in levels is more than 300mm. For example, falls out of windows, falls from balconies or landings, falls from accessible roofs, into basement wells, and over garden retaining walls.
Most vulnerable: Under 5 years.
23. Electrical hazards
Hazards from electrical shock and electricity burns, including from lightning strikes. Most vulnerable: Under 5 years.
24. Fire
Threats from uncontrolled fire and associated smoke. It includes injuries from clothing catching alight, which appears to be common when people attempt to put out a fire. It does not include clothing catching alight from a controlled fire by reaching across a gas flame or an open fire used for space heating.
Most vulnerable: 60 years plus.
25. Flames, hot surfaces etc
Burns or injuries caused by contact with a hot flame or fire and contact with hot objects or hot non-water-based liquids, and scalds - injuries caused by contact with hot liquids and vapours. It includes burns caused by clothing catching alight from a controlled fire or flame.
Most vulnerable: Under 5 years.
26. Collision and entrapment
This category includes risks of physical injury from:
A) Trapping body parts in architectural features, such as trapping limbs or fingers in doors or windows.
Most vulnerable under 5 years.
B) Striking (colliding with) objects such as architectural glazing, windows, doors, low ceilings, and walls.
Most vulnerable: 16 years over.
27. Explosions
Threat from the blast of an explosion, from debris generated by the blast, and from the partial or total collapse of a building as the result of an explosion.
Most vulnerable: No specific group
28. Position and operability of amenities etc
Threats of physical strain associated with the functional space and other features at dwellings.
Most vulnerable: 60 years plus
29. Structural collapse and falling elements
The threat of the dwelling collapsing, or of an element or a part of the fabric being displaced or falling because of inadequate fixing or disrepair, or as a result of adverse weather conditions. Structural failure may occur internally or externally.
Most vulnerable: No specific group