What was found in ZIP 99840
The level at this ZIP's main supplier, the highest level anywhere in it, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Copper | 854 µg/L 66% of the EPA limit 1300 µg/L Main supplier: SKAGWAY · 9,411 people · 2017 | 1/1 | SYR4 |
| Nitrate | 475 µg/L 4.8% of the EPA limit 10000 µg/L Main supplier: SKAGWAY · 9,411 people · 2019 | 1/1 | SYR4 |
| Fluoride | 340 µg/L 8.5% of the EPA limit 4000 µg/L Main supplier: SKAGWAY · 9,411 people · 2019 | 1/1 | SYR4 |
| Nitrate-Nitrite | 300 µg/L 3% of the EPA limit 10000 µg/L Main supplier: SKAGWAY · 9,411 people · 2018 | 1/1 | SYR4 |
| Barium | 61 µg/L 3.1% of the EPA limit 2000 µg/L Main supplier: SKAGWAY · 9,411 people · 2019 | 1/1 | SYR4 |
| Lead | 14.75 µg/L 98% of the EPA limit 15 µg/L Main supplier: SKAGWAY · 9,411 people · 2017 | 1/1 | SYR4 |
| Gross Alpha, Excl. Radon And U | 3.4 pCi/L 23% of the EPA limit 15 pCi/L Main supplier: SKAGWAY · 9,411 people · 2018 | 1/1 | SYR4 |
| Combined Radium (-226 And -228) | 1.6 pCi/L 32% of the EPA limit 5 pCi/L Main supplier: SKAGWAY · 9,411 people · 2018 | 1/1 | SYR4 |
| Lead | 0.0029 mg/L 19% of the EPA limit 0.0150 mg/L Main supplier: SKAGWAY · 9,411 people · 2023 | 1/1 | LCR |
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 the
system's samples — over 100% is worth reading, but is not by itself a
violation.
Formal violations are listed separately.
Water suppliers serving ZIP 99840
| Supplier | State | Population served |
|---|---|---|
| SKAGWAY | AK | 9,411 |
Frequently asked questions about ZIP 99840 tap water
Is the tap water in ZIP 99840 safe to drink?
EPA testing detected 9 contaminants across the water suppliers serving ZIP 99840. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and your utility's annual Consumer Confidence Report for the official status.
Which water suppliers serve ZIP 99840?
1 public water supplier report EPA drinking-water monitoring for ZIP 99840. Each is listed above with its population served.
What contaminants are in ZIP 99840's water?
EPA monitoring detected Copper, Nitrate, Fluoride, Nitrate-Nitrite, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.