search

edgi-govdata-archiving / EEW_SDWA_NJ

An open educational resource developed at the Environmental Data and Governance Initiative for interactive exploration of New Jersey's waters and water pollution.
https://eew-sdwa-nj.streamlit.app/
GNU General Public License v3.0
1 stars 0 forks source link

Define water system sizes #21

Closed Frijol closed 1 year ago

Frijol commented 1 year ago

Put the technical definitions of e.g. "very small" on the page somewhere

ericnost commented 1 year ago

Yea, actually i'm not sure there is a technical definition (!) I can't find one anyway. So this could either be a learning moment for students (can you try to find out what these mean?) or there might be another way of classifying systems, such as POPULATION_SERVED_COUNT

Frijol commented 1 year ago

ha interesting.

Additional useful text from p 6 of https://www.njwatercheck.com/Content/documents/Understanding%20How%20the%20Water%20Sector%20is%20Organized%20in%20NJ.pdf

Public community water systems are classified as small, medium, or large based on the residential populations that they serve. The size classification of a system determines the frequency and amount of sampling for certain water quality regulations that is required. Approximately 96% of New Jersey residents served by public water systems are supplied by medium or large community water systems. There are many very small drinking water systems and relatively few very large systems.

...oh, cool, same doc, this seems to give a usable definition in terms of population served: image

Frijol commented 1 year ago

Hm the direct quote is actually from p 11 of https://www.state.nj.us/dep/watersupply//pdf/violations2019.pdf but not correctly attributed in the NJ Water Check paper

Community water systems are further classified as small, medium, or large based on the residential populations that they serve. The size classification of a system will determine the frequency and amount of sampling that is required. Approximately 96% of New Jersey residents are supplied by medium or large community water systems. Table 1 shows a summary of the population served by various size community water systems.

Frijol commented 1 year ago

Here we go:

System Size System size is defined by the population served: Very Small: 500 or less Small: 501 - 3,300 Medium: 3,301 - 10,000 Large: 10,001 - 100,000 Very Large: Greater than 100,000

from https://echo.epa.gov/help/drinking-water-qlik-dashboard-help#vio

ericnost commented 1 year ago

Nice find! 💯