Original text in English, shown unchanged.
Important Information for Our Water Customers regarding Total Trihalomethanes (TTHM)
The City of San Luis water system exceeded the maximum contaminant level (MCL) for Total Trihalomethanes (TTHM) in the second quarter of 2026, with average levels of 0.089 mg/L and 0.088 mg/L against a standard of 0.080 mg/L. This is not an emergency, and residents do not need to boil their water or take other corrective actions. The City has collected additional samples showing TTHM levels below the standard and is implementing infrastructure improvements to enhance water circulation and reduce TTHM formation.
- Location
- San Luis, Arizona
- Country
- 🇺🇸 USA
- Start
- 01/04/2026, 02:00
- End
- 22/09/2026, 11:18
- Event type
- Chemical contamination, Limit exceeded
- Status
- Lifted
- Region
- Arizona
- Last updated
Timeline
- · Alert first recorded
- · Start according to source
- · End according to source
- · Record last updated
What to do now
According to the source this case has been officially lifted. The measures below applied during the incident and are documented for historical reference only.
Sources
This summary was generated automatically. For binding information consult the linked source.
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Reverse osmosis BE WA3: against PFAS, pesticides and heavy metals
Cuts chemical loads such as PFAS, nitrate, lead and pesticides by up to 99 percent. Boiling does not help here.
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