The Drinking Water Treatability Database (TDB) presents referenced information on the control of contaminants in drinking water for use by
- drinking water utilities,
- first responders to spills or emergencies,
- treatment process designers,
- research organizations, and
The TBD provides referenced information gathered from thousands of literature sources assembled on one site. The literature includes bench-, pilot-, and full-scale studies of surface water, groundwater and laboratory water. The literature comes from peer-reviewed journals and conferences, other conferences and symposia, research reports, theses, and dissertations.
The TDB includes over 60 regulated and unregulated contaminants and their properties. Contaminants include those
- regulated in drinking water,
- on the Contaminant Candidate List (CCL),
- of water security interest,
- of pesticide registration interest, and
- endocrine disruptors and pharmaceuticals.
An overview tab includes a contaminant’s importance, regulation, presence on the CCL, pesticide registration, etc. For each contaminant, a property tab includes parameters such as solubility, vapor pressure and Henry’s Law constant. Microbial properties include parameters such as taxonomy, size and shape. For each contaminant, a fate and transport tab presents parameters such as volatilization half-life and biodegradation half-life that may be useful in assessing the contaminant’s presence in source waters.
The Find a Contaminant page leads to the TDB’s current contaminants. However, because control strategies for disinfection byproducts (DBPs) are different from contaminants present in source waters and entering into a water treatment plant, DBPs are not included in the TDB.
The TDB includes more than 25 treatment processes used by drinking water utilities. An Overview Page describes each treatment process. It notes key process parameters such as coagulant dose, oxidant dose, filter loading rate, filter depth and contact time, and key water quality parameters such as pH, temperature, turbidity and alkalinity, upon which the treatment process effectiveness depends. The Find a Treatment Process page leads to these processes. The database can do the following:
- Identify effective drinking water treatment processes
- Plan for future treatment plant upgrades
- Provide information to first responders to spills or emergencies
- Recognize research needs
- Complement literature reviews and literature searches
- Assist regulators in Best Available Technology and CCL decisions