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Fa√Īomn√•kan 2018: Guam Hydrologic Survey Outreach – NGLA Tour

Guam Hydrologic Survey Outreach provides the Northern Guam Lens Aquifer (NGLA) Tour to our policy makers, department executives, island development professionals, our children’s educators, and college students. This outreach tour is about gaining a better understanding in our quest towards the sustainable management and development of our island’s most valuable renewable resource, water. For more information, please call Ms. Norma Blas, 735-2685, nblas@triton.uog.edu.

2018 Tour Dates: UOG (SAME, GE, EV511) Р4/20 
Guam Water Kids & Department of Education Р3/28 | Executive Tour Р3/9 & 3/16
Friday, April 20: Northern Guam Lens Aquifer (NGLA) Tour, for UOG Students

Water and Environmental Research Institute of the Western Pacific¬†and¬†Professional & International Programs, University of Guam,¬†team up to¬†host this year’s Guam Hydrologic Survey’s NGLA Tour for¬†UOG Students.

Friday, April 20, the tour starts at UOG, Annex A, Room 6, 8:00 AM, for a 3-D virtual tour of the aquifer to take you for a dive into the freshwater lens. 8:30 AM, we then board the tour bus for the field experience of the NGLA.

See the itinerary map of tour stopovers (1 Р6), below, starting and ending at (1) UOG, Annex A. Select site number icon for stop description. Plus, to view the map below in (entire browser window) Google Maps, select the box corners icon, right of the menu bar. To view the map legend below, select the left arrow panel icon, left of the menu bar.

Download Aquifer Tour Materials: Tour Booklet   NGLA Map   Tour Poster   Evolution NGLA   Guam Geology   Guam Stratigraphy              Philippine Plate Chronology  | and more  GHS Water Resource Library.  Tour binder and latest full size rolled up print of the NGLA map will be provided.

Wear & Bring:  wear Рpants and closed toe shoes (quarry, MSHA regulations); bring Рown lunch and drink (at least 1 liter water), umbrella, sweat towel, sunglasses, sunscreen, and mosquito repellent.
Provided –¬†Hard hats, and reflective safety vest.

Sustainable management in your hands >>more

The Guam Hydrologic Survey and Comprehensive Water Monitoring Program (GHS and¬†CWMP), Guam Public Laws ¬†24-247¬†and 24-161, respectively, were established¬†to develop¬†an inter-agency cooperation for gathering and publicly providing¬†water and environmental information. The ultimate goal is to support our quest¬†of determining¬†sustainable development and management of our island’s most valuable renewable resource, water. The mandate intent is to form a network that will help us improve our understanding of our water resources through data collection, analysis, interpretation, recommendations, reports, and presentation in all efforts to¬†determine its optimum development for sustainable utility. GHS and CWMP contains the island’s collection of water resource and related hydrologic and environmental information by way of¬†an organized online database system.

Get the PDF files:

Guam Hydrologic Survey – Guam Public Law 24-247
Comprehensive Water Monitoring Program –¬†Guam Public Law 24-161
Sustainable Development and Management of Guam’s Groundwater: A Recommended Program – Executive Summary

GHS and CWMP Annual Reports

Water and Environmental Research Institute of the Western Pacific (WERI), University of Guam (UOG), is charged with administering the GHS and CWMP. Annual reports are prepared for the years:

FY1998 Jenson and Jocson (1998) Hydrologic Data Collection on Guam: FY1998 Report, Technical Report No. 83
FY2018 FY2017  FY2016  FY2015  FY2014  FY2013  FY2012  FY2011  FY2010  FY2009  FY2008  FY2007  FY2006  FY2005 

GHS Sponsored WERI Publications – annual listing, 2015-1998.

GHS and CWMP Program Mission Statement, Goals, Funding

Mission Statement

The Guam Hydrologic Survey (GHS) and the Comprehensive Water Monitoring Program (CWMP) were created in 1998 by the 24th Guam Legislature under Public Laws No. 24-247 and 24-161, respectively. The Water and Environmental Research Institute (WERI) was charged with administering the annual legislative appropriations to drive these two programs and facilitate, direct, and implement their objectives. Both programs are now an integral component of water resources research, information dissemination, education and training on Guam.


The Guam Hydrologic Survey consolidates and archives new and historical hydrological data collected by local and federal government agencies and private consultants, and conducts research on water-related issues of local importance. GHS also funds a variety of water resource educational programs, including guest lectures and seminars at UOG and in the community, informational and training workshops for teachers and other professionals, field trips and talks for schoolchildren, and the publication and distribution of educational posters, maps, and fact sheets.

The CWMP was created to collect data on saltwater intrusion and water lens thickness in Guam’s northern aquifer, and stream flow for surface waters in the south. The program builds on studies previously undertaken by the US Geological Survey (USGS) that had been abandoned in the 1990s because of a discontinuance of matching funds from the Government of Guam. The CWMP annual appropriations from the Guam legislature restored the program in 1998 and since then have facilitated the collaborative reinstatement of these studies with USGS under their 50-50 Federal/State-Territory cost-sharing program for water resource monitoring.

The foresight of the Guam Legislature in creating these two very important programs deserves special mention here. With the continued support of the Legislature, we now maintain several vital water resources databases for Guam and collect essential water resource data in collaboration with the USGS. Our understanding of the complex physical, chemical and biological processes that influence Guam’s water resources has broadened considerably and the increase in graduate student research opportunities has substantially added to the number of highly trained water resources professionals in the island’s technical work force.

Funding 2018

GHS and CWMP appropriations written into each public law are $204,200 and $173,948 respectively. Local budgetary constraints saw a 6% reduction in funding support for both programs in FY’09, i.e., $192, 309 and $163,817 awarded for GHS and CWMP respectively. These shortfalls continued through FY’12. An additional 5% reduction was levied against each account by Governor Calvo in FY’12 and is continuing through FY’14. This reduces the total awards to $182,694 for GHS and $155,626 for CWMP. The information presented herein summarizes all GHS and CWMP program objectives and related activities undertaken in FY’17.

Cooperators and contributors (GWRDG|TEG)

WERI is also a member of the local water resource interagency organization called the Technical Experts Group (TEG) and the Groundwater Resource Development Group (GWRDG) establish by the 16 July 2010 Memorandum of Understanding between the US Navy and Guam Waterworks Authority (Appendix I). The MOU provides an additional venue for meeting the GHS and CWMP mandates to ‚Äúestablish a direct working relationship with each organization collecting hydrologic data important to Guam, and maintain a permanent flow of new data from each organization to keep the data library up to date.‚ÄĚ Local and federal agencies that are party to or affected by the MOU include Guam Waterworks Authority, Guam Environmental Protection Agency, CUC, US Navy (NAVFACMAR), USAF (36 CES), and USGS. Interagency groups also include private consultants: Duenas Camacho and Associates, Allied Pacific Environmental Consultant (APEC), EA Engineering, Brown and Caldwell, and AECOM. Meetings are organized and held quarterly at Guam Waterworks Authority (Gloria B. Nelson Public Service Building), Fadian. Current discussion is the expansion of monitoring (observation) wells, see details in CWMP Research Projects section. The interagency group organization, formed of three groups: executive, working, working group, and the technical team (See the GHS and GWRDG organization chart>>).

The inter-agency group meets quarterly to discuss concerns, pool resources, share ideas, provide update, consult, and gain professional acquaintance and partnerships. Here is a list of agencies in attendance:

Government of Guam:

GWA –¬†Guam Waterworks Authority
GEPA – Guam Environmental Protection Agency
GCUC – Guam Consolidated Commission on Utilities
GBSP – Guam Bureau of Statistics and Plans
GDPW – Guam Department of Public Works
GPUC – Guam Public Utilities Commission
NGSWCD – Northern Guam Soil Water Conservation District
UOG –¬†University of Guam
WERI – Water and Environmental Research Institute of the Western Pacific

US Federal:

USGS PIWSC – US Geologic Survey, Pacific Islands Water Science Center
NAVFAC Marianas – Naval Facilility Command Marianas, US Navy, Guam
36th CE – Environmental Flight, 36 CE SQ, USAF, Andersen AFB, Guam

Private Sector:

AECOM – Architecture, Engineering, Construction, Operations, and Management: Guam Expansion Project
APDI – Allied Pacific Drilling Inc.
APEC –¬†Allied Pacific Environmental Consulting, Inc.
B & C – Brown and Caldwell: Essential Ingredients¬ģ
DCA – Duenas, Camacho and Associates, Inc.
GHD –¬†Gutteridge Haskins & Davey
GWK – Guam Water Kids
IREI – Island Research and Educational Initiative
PCR – PCR Environmental, Inc.

Interagency Charter and Cooperation Agreements

Guam Water Resources Technical Experts Operating Charter (near Final Draft)

The Guam Water Resources Technical Experts plan and cooperate towards the best technical solutions and advice in support of sustainable development and management (See Draft of the GWRTE Operating Charter >>).

The operating charter includes the following agencies:

  • Guam Waterworks Authority
  • Guam Environmental Protection Agency
  • Guam Department of Public Works
  • Water and Environmental Research Institute of the Western Pacific
  • Department of Navy, Naval Facilities Engineering Command Marianas
  • United States Geological Survey


GWA and WERI have a great interagency partnership for more than several decades now. We continue to work together and have (See GWA-WERI Memorandum of Understanding >>).


WERI and GEPA also have a long history of cooperative partnership through research projects (e.g. GWUDI determination, septic tank survey…), data contribution, water quality lab, scientific advise and recommendations, and field surveys. A memorandum of understanding has been discussed and a document similar to GWA-WERI MOA is in the works and will be done soon.