Compliance record
Other contaminants detected
Each bar shows the measured level as a share of the EPA limit: green is
well under, amber is close to it, red is over. For lead and copper the
limit applies to exactly the 90th-percentile figure shown, so red there
means a real exceedance. For everything else the limit applies to a
running annual average while the figure is the single worst sample on
record — over 100% is worth reading, but is not by itself a violation.
Formal violations are listed separately.
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Lead | 0.0085 mg/L 57% of the EPA limit 0.0150 mg/L | 1/1 | LCR | 1997 |
Utility contact
Frequently asked questions about Cloister
Is Cloister tap water safe to drink?
EPA monitoring detected 1 contaminant in Cloister's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.
What contaminants were detected in Cloister's water?
EPA monitoring detected Lead. The full list with the level and data source for each is above.
How many people does Cloister serve?
Cloister reports serving 29 people in Washington, per its EPA record.
Has Cloister had any water quality violations?
The EPA has no formal drinking-water violations on file for Cloister.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.