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After a 7‑year trial, U.S. federal judge Edward Chen ruled that water fluoridated at 0.7 mg/L poses an “unreasonable risk” to children’s IQ. The Environmental Protection Agency (EPA) must now change how it regulates fluoride.

Read full case summary

Judge Chen’s 80‑page ruling (PDF)

▶ Deposition footage: Interviews with CDC, EPA, and other federal health officials are available through Fluoride Action Network.

The U.S. National Toxicology Program (NTP) released a 2024 systematic review:
87 studies show fluoride lowers IQ; only 11 show no effect.
Read the report (PDF)

Fluoride is the new lead — but worse.
Learn more

Fluoride’s neurotoxicity (summary flyer):
Read the one-pager (PDF)

Dr. Christine Till's Canadian cohort study associating maternal fluoride exposure with lowered IQ scores in offspring was published in Jama Pediatrics in 2019.

When toxins are ingested, scientists apply a 10‑fold safety margin to protect sensitive individuals.

Even if 1.5 mg/L were the lowest observed harmful level, a safe dose should not exceed 0.15 mg/L—far below the 0.7 mg/L planned for Regina.

Municipalities who choose to fluoridate their water carry full legal and financial liability for harm caused by fluoridation.

No level of government has conducted toxicological testing of fluoridation chemicals - this has been proven in dozens of responses to Freedom of Information requests.

Though Health Canada recommends water fluoridation, it attempts to skirt responsibility of regulating water fluoridation chemicals by classifying them as “water treatment chemicals,” not food, drugs, natural health products, a source of a nutrient, or any other category, leaving regulation to the provinces.  However, as these chemicals treat people and not the water, they cannot be classified as such.  Further, health claims are made about fluoridation chemicals, saying they help prevent the disease of dental caries, and they should be regulated by Health Canada as such. 

Saskatchewan lists Hydrofluorosilicic Acid (HFSA) and sodium fluoride as an “acute hazardous substance”—yet they are diluted and added to drinking water.  This very corrosive acid, often contains traces of lead, arsenic, mercury and even radioactive substances.  If it spills, workers need hazmat suits to clean it up, and it can eat through concrete.

Saskatchewan's Water Security Agency has admitted in a Freedom of Information request that they do not possess any toxicological studies showing that HFSA is safe for human consumption, but that they rely solely on the National Sanitation Foundation (NSF)'s Standard 60 certification to ensure that water fluoridation chemicals are safe.  Yet, the NSF, a non-government agency that has no legal jurisdiction to approve therapeutic agents, has admitted under oath that its NSF Standard 60 toxicology requirements for water fluoridation chemicals have not been met.

HFSA Safety Data Sheet (Feb 2025, Cleartech)

In 2021, a Cleartech rep confirms HFSA for Regina water (video)

Bottom line: No government body is ensuring fluoridation chemicals are safe for human consumption.