Boundaries
Maps Help Define The Area Affected
When possible, use maps and brief descriptions of the boundaries of the area affected. Maintain and update maps of the water service area. Maps can be sent out as printed or electronic versions. Make sure the maps:
- Are presented at a legible scale with legible fonts
- Are uncluttered
- Reflect commonplace names and reference points
- Have crisp lines
- Are easy to read
Descriptions
Clearly communicating the boundaries of affected areas also requires careful consideration of verbal descriptions so that spokespersons, radio, and other media can briefly but accurately depict the service area affected.
A key component of a drinking water advisory is to communicate clearly the area affected. Many customers do not know which water system provides their service and broadcast media usually reach a large audience beyond the affected area.
Clearly describe the boundaries of the affected area using street names, place names, building identification information (e.g., building numbers, unit numbers, wings, etc.) and well known reference points.
Maps
Maps help illustrate the affected area. Water systems can generate maps using internal or online mapping tools (e.g., geographic information system [GIS]). These maps can be posted on agency websites, or distributed electronically or as printed material. Update the map as the situation changes.
Figure 5: Example of a Simple Map to Designate an Area Affected by a Drinking Water Advisory
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to assist in identifying at-risk populations served by a water system)
