| awra.org | American Water Resources Association |
| nrwa.org | National Rural Water Association [NRWA] |
| iawq.org.uk | International Association on Water Quality |
| amsa-cleanwater.org | Association of Metropolitan Sewerage Agencies (U.S.) |
| chkstt.org | Chinese Society for Trenchless Technology (CSTT) |
| midwestwateranalysts.org | Midwest Water Analysts Association |
| lweaonline.org | Louisiana Water Environment Association (LWEA) |
| iahr.org | International Association of Hydraulic Engineering and Research [IAHR] |
| ensmp.fr | The International Association of Hydrological Sciences (IAHS) |
| aihydro.org | American Institute of Hydrology |
| waterworld.com | www.waterworld.com/ |
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