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 95th percentile of this
system's samples — over 100% is worth reading, but is not by itself a
violation. Where a single sample came in higher than that percentile, it
is noted under the bar. Formal violations are listed separately.
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 2/2 | LCR | 2023 |
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Frequently asked questions about Willow Grove Mill
Is Willow Grove Mill tap water safe to drink?
EPA monitoring detected 1 contaminant in Willow Grove Mill'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 Willow Grove Mill's water?
EPA monitoring detected Lead. The full list with the level and data source for each is above.
How many people does Willow Grove Mill serve?
Willow Grove Mill reports serving 3,090 people in Delaware, per its EPA record.
Has Willow Grove Mill had any water quality violations?
The EPA has no formal drinking-water violations on file for Willow Grove Mill.
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.