Compliance record
Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.
| Violation | Type | Status | Period |
|---|---|---|---|
| MCL | Health-based | Resolved | 2018-10-01 → 2018-12-31 |
| MCL | Health-based | Resolved | 2018-10-01 → 2018-12-31 |
| MCL | Health-based | Resolved | 2018-10-01 → 2018-12-31 |
| MCL | Health-based | Resolved | 2018-07-01 → 2018-09-30 |
| MCL | Health-based | Resolved | 2018-07-01 → 2018-09-30 |
| MCL | Health-based | Resolved | 2018-07-01 → 2018-09-30 |
| MCL | Health-based | Resolved | 2018-04-01 → 2018-06-30 |
| MCL | Health-based | Resolved | 2018-04-01 → 2018-06-30 |
| MCL | Health-based | Resolved | 2018-04-01 → 2018-06-30 |
| MCL | Health-based | Resolved | 2018-04-01 → 2018-06-30 |
Other contaminants detected
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Copper | 336.5 µg/L 26% of the EPA limit 1300 µg/L
worst single sample: 410 µg/L | 28/28 | SYR4 | 2012–2017 |
| Lead | 0.0055 mg/L 37% of the EPA limit 0.0150 mg/L | 17/17 | LCR | 2025 |
| Lead | 5.75 µg/L 38% of the EPA limit 15 µg/L
worst single sample: 6.2 µg/L | 16/28 | SYR4 | 2012–2017 |
| Chloroform | 99.18 µg/L No EPA limit set
worst single sample: 100 µg/L | 5/7 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 103.2 µg/L 172% of the EPA limit, at the 95th percentile of samples — 60 µg/L
worst single sample: 108 µg/L | 5/7 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 63.84 µg/L No EPA limit set
worst single sample: 64.8 µg/L | 5/7 | SYR4 | 2012–2019 |
| Bromodichloromethane | 15.48 µg/L No EPA limit set
worst single sample: 16 µg/L | 3/7 | SYR4 | 2012–2019 |
| Dibromochloromethane | 1.873 µg/L No EPA limit set
worst single sample: 2 µg/L | 3/7 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 38.22 µg/L No EPA limit set
worst single sample: 39.8 µg/L | 3/7 | SYR4 | 2012–2019 |
| TTHM | 118.7 µg/L 148% of the EPA limit, at the 95th percentile of samples — 80 µg/L
worst single sample: 120 µg/L | 3/7 | SYR4 | 2012–2019 |
| Arsenic | 1.6 µg/L 16% of the EPA limit 10 µg/L | 1/2 | SYR4 | 2013–2016 |
| Monochloroacetic Acid | 3.09 µg/L No EPA limit set | 1/7 | SYR4 | 2012–2019 |
26 contaminants tested, none detected
Utility contact
Frequently asked questions about Koyukuk Safewater Facility
Is Koyukuk Safewater Facility tap water safe to drink?
EPA monitoring detected 12 contaminants in Koyukuk Safewater Facility'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 Koyukuk Safewater Facility's water?
EPA monitoring detected Copper, Lead, Lead, Chloroform, Total Haloacetic Acids (HAA5), and others. The full list with the level and data source for each is above.
How many people does Koyukuk Safewater Facility serve?
Koyukuk Safewater Facility reports serving 85 people in Alaska, per its EPA record.
Has Koyukuk Safewater Facility had any water quality violations?
The EPA has 1419 violations on file for Koyukuk Safewater Facility, of which 28 are health-based (a contaminant limit or required treatment was breached) and 2 remain open. The rest are monitoring or reporting failures.
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.