Table 1.
Summary of the origin, total gram‐negative and carbapenem‐resistant gram‐negative bacterial counts obtained in this study
| Sample | Date | Location (Type) | GPS Location | Total bacteria (cfu/100 ml) | Carbapenem‐resistant Bacteria (cfu/100 ml) |
|---|---|---|---|---|---|
| W1 | 6/7/2016 | CSUN Duck Pond (artificial ponda) | 34.2367024, ‐118.5261293 | 4.2 × 105 | 150.0 |
| W2 | 8/2/2016 | CSUN Duck Pond (artificial ponda) | 34.2367024, ‐118.5261293 | 1.2 × 105 | 10.0 |
| W3 | 8/17/2016 | Lake Balboa (reclaimed water from DCTWRPb) | 34.182312, ‐118.495627 | 2.4 × 104 | 22.5 |
| W4 | 9/29/2016 | Hansen Dam (flood control reservoir) | 34.271505, ‐118.388383 | 8.3 × 104 | 42.4 |
| W5 | 10/5/2016 | Tujunga Ponds Wildlife Sanctuary (spring waterc) | 34.268050, ‐118.340026 | 8.8 × 105 | 16.0 |
| W6 | 10/7/2016 | Woodley Wildlife Lake (reclaimed water from DCTWRPb) | 34.177256, ‐118.472841 | 4.0 × 104 | 324.0 |
| W7 | 10/11/2016 | Reseda Park Lake (artificial lake with potable waterd) | 34.188714, ‐118.534383 | 1.0 × 104 | 0.1 |
| W8 | 1/29/2017 | Magic Johnson Park lake (Potable waterd) | 33.919458, ‐118.261776 | 1.2 × 105 | 11.0 |
| W9 | 1/17/2017 | Rancho Simi Community Park Duck Pond (Potable waterd) | 34.266453,‐118.764119 | 3.9 × 104 | 36.8 |
| W10 | 3/1/2017 | Malibu Creek Rock Pool (natural poole) | 34.096555, ‐118.729879 | 4.9 × 104 | 9.2 |
Note.We obtained two water samples from this artificial pond, one before (June of 2016) and one after (August 2016) it was cleaned and the water–pumping system fixed. This artificial pond uses circulation of potable water.
Lake Balboa and Woodley Wildlife Lake are filled with reclaimed water from the Tillman Water Reclamation Plant (DCTWRP). Lake balboa is a recreational lake, and Woodley Wildlife lake is a wild wetland habitat with many species of birds.
The water from the Tujunga Ponds Wildlife Sanctuary is spring water from the Tujunga Canyon delivered to the pond via a small stream.
Reseda Park Lake, Magic Johnson Park lake, and Rancho Simi Community Park Duck Pond use circulation of potable water. Reseda park lake is an asphalt‐lined urban lake.
Malibu Creek Rock Pool is a natural pool filled with rain run‐off.