Daily Archives: August 14, 2012

Environmental Working Group (EWG) statement on fluoride…

I was searching the web for certain info and ran across the EWG statement on fluoride submitted as a valentines day present to the USEPA and Dept of Health and Human Services, dated Feb. 14, 2011. (click here for the entire comment) In times past I have almost always ended up disagreeing with EWG on issues.

So I believe this is may be a first….I have not read the entire statement, but I do agree with a major point included in their comments, which I have reproduced below. Addition of fluoride to drinking water is not necessary for dental health…..dentists need to stop pretending that it is, and focus on providing dental care, not drinking water medication.

4. Water fluoridation guidelines should take into account the fact that fluoride ingestion is not necessary to obtain reported anti-caries effects.

We urge HHS to consider the benefits and drawbacks of water fluoridation in comparison to other methods of fluoride application. The federal agencies’ action on fluoride is based on an assurance that fluoride risks are concentrated on a small subgroup of children who are at an elevated risk of severe fluorosis. We question the comprehensiveness of this assessment, and also believe that these are unacceptable risks since sufficient fluoride can be delivered to teeth with methods that result in lesser system ingestion.

A CDC review of fluoride effectiveness found comparable anti-caries benefits for fluoride deliver via topical treatment or water fluoridation (Griffin 2007). Studies find that the sustained use of a pea-size amount of fluoridated toothpaste achieves substantial reduction in dental caries, with minimum risk of fluorosis. A 2010 study of children drinking unfluoridated water found a 40 percent reduction in caries with no detectable fluorosis in middle school aged children living in Bergen Norway. On the contrary children given fluoride lozenges had caries reduction but a 6.58-fold increase in mild to moderate enamel fluorosis (Pendrys 2010).

Fluoride benefits vary by age. There is no evidence to support fluoride exposure for the developing fetus and infants age 0 to 6 months (Leverett 1997, ADA 2011). On the contrary exposures during this period may be harmful. Most studies as well as exhaustive reviews by EPA and the European SCHER find that formula-fed babies in regions with water fluoridation ingest too much fluoride over their first year of life (Hujoel 2009, EPA 2011, EU SCHER 2010). For this reason parents should be cautioned to mix infant formula with fluoride-free water, although this practice is uncommon.

In the United States approximately 95 percent of toothpaste sold contains fluoride, making this a common and effective method for delivering fluoride to teeth. By weight, toothpaste has approximately 1,500 times more fluoride than water with the HHS guideline (~1,000 ppm vs 0.7 ppm), however EPA’s exposure assessment suggests that even accounting for improper uses far less fluoride from toothpaste will reach systemic circulation compared to the amount ingested in water (EPA 2011b).

The European Union differs from the HHS, in that it finds that there is no obvious advantage to water fluoridation compared to topical treatment for adults and children whose permanent teeth are in (EU SCHER 2010). Thus topical treatments could be a better delivery mechanism for fluoride when the impacts to teeth bone and other types of toxicity are fully accounted for.

Central Coast Regional Water Quality Control Board (CA) to consider stay of ag rules….

STATE WATER RESOURCES CONTROL BOARD

WHAT: Public hearing on rules governing agricultural wastewater discharge

WHEN: 9:30 a.m. Aug. 30

WHERE: Cal/EPA Headquarters Building, 1001 I St., Sacramento

Click here for more details….

Unexpected rainfall helps fill depleted reservoirs in India

“An unexpected surge in  rainfall since the last week of July has soaked parched fields in many parts of the country and filled up depleted reservoirs, limiting the impact of drought-like conditions since June, although the government is still concerned about rising food prices.”

Click here for news article….

Sewage cross-connection plagues Srirangam (India)….

“The drinking water overhead tank (OHT) complex at the south-west corner of the locality has been subject to much pollution over the past few months owing to the seepage of sewage from a faulty underground sewer line.”

Click here for more….

Mississippi River saltwater barrier to be constructed…

“Construction could begin as early as Wednesday on a $5.8 million underwater barrier to block the upriver flow of saltwater in the Mississippi River that is threatening area water supplies. The 1,700-foot-long underwater dam will be built at Alliance in Plaquemines Parish, using sediment dredged from the river bed just upstream.”

Click here for more….

Seoul (Korea) issues tap water warning…

“A recent outbreak of algae in Seoul’s water reservoirs has led the city  government to issue a water quality advisory amid public anxiety, authorities  said.”

“The Seoul Metropolitan Government issued its first algae advisory in four  years Thursday for some parts of the Han River that runs through the capital  city, while some city residents were stocking up on bottled water, Yonhap News  Agency reported.”

Click here for more….

 

Martinez (CA) residents face taste and odor problems…

Martinez Reservoir stores water for the City of Martinez. Operated by the Contra Costa Water District (CCWD), the reservoir recently experienced an algae bloom. Algae blooms tend to occur during the warm summer months….causing taste and odor problems…..click here….