2007 NNPDWR
The revised Navajo Nation Primary Drinking Water Regulations (NNPDWR) was formally adopted by the Resources Committee of the Navajo Nation
Council, Navajo EPA’s legislative oversight.  The NNPDWR continues to be amended to address concerns over risks associated with drinking water.

100—Introduction
 200—Maximum Contaminant Level - new regulations will include Arsenic MCL, Uranium MCL and changes to the Radionuclide section.
300—Sanitary Surveys - section that outlines the protocol for conducting a survey.
400—Sampling and Analytical Requirements
 500—Reporting and Recordkeeping
 600—Public Notification
 700—Lead and Copper
 800—Surface Water Treatment
 900—Use of Non-Centralized Treatment Devices
1000—Treatment Techniques
1100—Disinfectant, Disinfection By-Products (DDBP)
1200—Consumer Confidence Report (CCR)
1300—Enhanced Surface Water
1400—Operator Certification (OpCert)
1500—Minimum Design Regulations
1600—Construction Permits
1700—Wellhead Protection Regulations
1800—Secondary Drinking Water Standards
1900—Consecutive Public Water Systems
2000—Cross-Connection and Backflow Prevention
2100—Enhanced Filtration and Disinfection (LT1)
2200—Initial Distribution System Evaluation
2300—Stage 2 Disinfection By-Products
2400—Enhanced Treatment with Cryptosporidium (LT2)

NNPDWR Appendices
The Great Seal of the Navajo Nation was designed by Mr. John Claw, Jr., of Many Farms, Arizona, and was officially adopted by
the Navajo Tribal Council on January 18, 1952, by resolution CJ-9-52.

The Great Seal had forty eight projectile points or arrowheads symbolizing the Navajo Nations protection within the forty eight
states (as of 1952). Since then, two points have been added to represent the entire fifty states of the United States. The opening
at the top of the three concentric lines is considered the East. The lines represent the rainbow and sovereignty of the Navajo
Nation. The rainbow never closes on the Nation's sovereignty. The outside line is red, the middle line is yellow and the inside
line, blue. The yellow sun shines from the east on the four sacred mountains, Sisnaajinii, Tsoodzil, Dook'o'oslííd, and Dibé
Ntsaa. Yoolgaii, Dootl'izhii, Diichili, and Baashzhinii are the sacred mountain ceremonial stones.

Two cornstalks with pollen symbolizes the sustainer of Navajo life. A horse, cow, and sheep, located in the center, symbolizes
the Navajo livestock.
Regulations
Navajo Nation Environmental Protection Agency • Public Water Systems Supervision Program
The Navajo Nation Flag, designed by Jay R. DeGroat of Mariano Lake, New Mexico, was officially accepted
by the Navajo Tribal Council on May 21, 1968, by resolution CMY-55-68.


The copper color outlines the present reservation, with the original Treaty of 1868 in dark brown. In the
cardinal points on the tan field are the Sacred Mountains. A rainbow, symbolizing sovereignty arches over
the Navajo Nation. In the center of the reservation, a circular symbol depicts the sun above two green
stalks of corn between which are three animals representing the Navajo livestock economy, a traditional
Hogan and a more modern type of house. Between the hogan and house is an oil derrick symbolizing the
resource potential of the Nation, and above this are represented the wild fauna of the reservation. At the
top, nearest to the sun, the modern sawmill symbolizes the progress and industry currently characteristic
of the Nation's development.