Table 1. Water sampling locations in this study.

Location	Source type	Latitude	Longitude	Depth to water (m)	Source	Treatment	Additional protection	Samples collected/weeks	16S rRNA gene analysis
1	Stone spout	N 27°40.482	E 85°19.693	Ground level	Shallow aquifer	Untreated	None	40/53	No
2	Stone spout	N 27°40.461	E 85°19.693	Ground level	Shallow aquifer	Untreated	None	38/53	Yes
3	Stone spout	N 27°40.426	E 85°19.51	Ground level	Shallow aquifer	Untreated	None	51/53	No
4	Sunken well	N 27°40.454	E 85°19.665	8.4	Shallow aquifer	Untreated	Mesh covered	51/53	No
5	Sunken well	N 27°40.503	E 85°19.660	7.1	Shallow aquifer	Untreated	Mesh covered	50/53	Yes
6	Sunken well	N 27°40.545	E 85°19.719	8.1	Shallow aquifer	Untreated	Mesh covered	50/53	No
7	Piped supply	N 27°40.422	E 85°19.645	Ground level	Delivery truck	Irregular chlorination	Locked container	51/53	No
8	Piped supply	N 27°40.457	E 85°19.698	Ground level	Delivery truck	Irregular chlorination	Locked container	50/53	No
9	Stone spout	N 27°40.607	E 085°19.540	Ground level	Shallow aquifer	Untreated	None	21/53	No
10	Stone spout	N 27°40.607	E 085°19.540	Ground level	Shallow aquifer	Untreated	None	30/53	No