Monthly Archives: May 2011

USEPA Table of Drinking Water Standards

Every few years USEPA updates a comprehensive reference table of drinking water standards and health advisories.

Click here for the 2011 Edition of Drinking Water Standards and Health Advisories.

CDC Optimal Fluoride Level Proposed

The Centers for Disease Control and Prevention (CDC) proposed on January 7, 2011 that all community water systems adjust the amount of fluoride to 0.7 mg/L to achieve an optimal fluoride level.  The CDC believes the optimal level is the concentration that provides the best balance of protection from dental caries while limiting the risk of dental fluorosis.

The CDC proposal was published in the Federal Register and the public comment period has closed.  Final action has not yet been taken to adopt this optimal level.

Click here for the January 7, 2011, proposal notice.

Click here for the CDC oral health web pages and additional information on fluoride.

USEPA Proposed Fluoride Reference Dose

On January 7, 2011, USEPA announced its intent to review the drinking water regulations for fluoride.  This action is a follow up to the second Six Year Review (SY2), released March 2010.

USEPA has proposed a reference dose (RfD) for fluoride of 0.08 mg/kg/day for protection against pitting of the tooth enamel (severe dental fluorisis).  The Agency believes that this value also protects against fractures and skeletal effects in adults.  The RfD is the estimate of the daily exposure that is likely to be without harmful effect during a lifetime. A decision has not yet been made regarding any proposed revision to the current MCLG and MCL of 4 mg/L.

Click here for information on the USEPA Fluoride Risk Assessment and Relative Source Contribution (RSC).

Washington, DC Water and Sewer Authority on Lead

In 2010, Washington, DC Water and Sewer Authority undertook a rebranding campaign and is now known as “DC Water.”

H.R. 1427 Grassroots Rural and Small Community Water Systems Assistance Act

Latest Title: Grassroots Rural and Small Community Water Systems Assistance Act of 2011
Sponsor: Rep Harper, Gregg [MS-3] (introduced 4/7/2011)      Cosponsors (15)
Latest Major Action: 4/7/2011 Referred to House committee. Status: Referred to the House Committee on Energy and Commerce.

Click here for full text of bill.


EO 13563 – Preliminary Review Plans Released

On January 18, 2011, the President issued Executive Order 13563, directing agencies to develop and submit a preliminary plan within 120 days that will explain how they will review existing significant regulations. 

Click here to read the Executive Order 13563.

Preliminary plans have been released by the White House for public review.  Agencies will finalize these plans this fall.

Click here to download the draft plans and see an Office of Management and Budget (OMB) video announcement. 

Hyponatremia…..Too Much Water can be Fatal

Hyponatremia is a very serious condition that can occur from drinking too much water after a long period of physical activity.
Phys Sportsmed. 2010 Apr;38(1):101-6.

Exercise-associated hyponatremia during winter sports.

Stuempfle KJ. Department of Health Sciences, Gettysburg College, Gettysburg, PA 17325, USA.


Exercise-associated hyponatremia (EAH) is hyponatremia that occurs <or= 24 hours after prolonged physical activity. It is a potentially serious complication of marathons, triathlons, and ultradistance events, and can occur in hot and cold environments. Clear evidence indicates that EAH is a dilutional hyponatremia caused by excessive fluid consumption and the inappropriate release of arginine vasopressin. Cerebral and pulmonary edema can cause serious signs and symptoms, including altered mental status, respiratory distress, seizures, coma, and death. Rapid diagnosis and urgent treatment with hypertonic saline is necessary to prevent severe complications or death. Prevention is based on educating athletes to avoid excessive drinking before, during, and after exercise.

Abstract source: National Library of Medicine