### Shadows cast by Settsu's waterfront - Record of PFAS pollution since the 2000's

### Shadows cast by Settsu's waterfront - Record of PFAS pollution since the 2000's

#### Cause and circumstances of the contamination
A quiet industrial area stretches across the land of Settsu. Here, special chemical compounds were once manufactured and have continued to be used as the city has developed. One of these compounds, PFOA (perfluorooctanoic acid), seeped deep into the ground over time and spread to groundwater without being noticed.

#### Groundwater and Tap Water Conditions
In 2020, when an environmental investigation was conducted, PFOA was detected in the groundwater at this site at much higher concentrations than expected. The values were much higher than the national standard, and were unprecedented in the country.

However, tap water supplied by cities is carefully controlled. Regular testing has shown that PFOA and PFOS concentrations are within safe limits and are not immediately dangerous for drinking. However, the public is again urged to refrain from using groundwater for drinking.

#### Impact on Residents' Health
In 2024, a study of the blood of local residents showed that about 30% of them had PFAS levels that exceeded international standards. The microscopic chemicals remain in the body and accumulate silently. Their effects are not yet fully understood, but experts are carefully monitoring their impact on health.

#### Corporate Responses and the Future
Companies with deep roots in the site are continuing their efforts to clean up the groundwater and provide explanations to the local people. It is imperative that the memory of the contamination not fade away, and that proper treatment and care for the environment remain essential.

#### Related Information
- **Ministry of the Environment investigation results (PFOA concentration)**: "High concentration of PFAS detected in groundwater in Settsu City.
- **Expert opinion on health effects**: "What is the long-term health risk of PFAS?"
- **Tap water test results**: "Is Settsu City tap water safe? The Latest Test Data"
- **Local cleanup measures and future issues**: "How should we respond to PFAS contamination? Efforts by Companies and the Government"

Where will the water sinking in this quiet town go? The time has come for science and human wisdom to be put to the test.