What was found in ZIP 98072
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 |
|---|---|---|---|
| Nitrate-Nitrite | 3537 µg/L 35% of the EPA limit 10000 µg/L Highest in the ZIP: CROSS VALLEY WATER DISTRICT · 24,695 people · 2019 | 1/2 | SYR4 |
| Nitrate | 3520 µg/L 35% of the EPA limit 10000 µg/L Highest in the ZIP: CROSS VALLEY WATER DISTRICT · 24,695 people · 2019 | 1/2 | SYR4 |
| Fluoride | 190 µg/L 4.8% of the EPA limit 4000 µg/L Highest in the ZIP: CROSS VALLEY WATER DISTRICT · 24,695 people · 2019 | 1/2 | SYR4 |
| TTHM | 45.2315 µg/L 57% of the EPA limit 80 µg/L Main supplier: WOODINVILLE WATER DISTRICT · 66,699 people · 2019
Highest in the ZIP: 53.2 µg/L — CROSS VALLEY WATER DISTRICT · 24,695 people · 2019 | 2/2 | SYR4 |
| Chloroform | 40.88 µg/L No EPA limit set Main supplier: WOODINVILLE WATER DISTRICT · 66,699 people · 2019
Highest in the ZIP: 51.19 µg/L — CROSS VALLEY WATER DISTRICT · 24,695 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 36.77 µg/L 61% of the EPA limit 60 µg/L Main supplier: WOODINVILLE WATER DISTRICT · 66,699 people · 2019
Highest in the ZIP: 44.35 µg/L — CROSS VALLEY WATER DISTRICT · 24,695 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 25.32 µg/L No EPA limit set Main supplier: WOODINVILLE WATER DISTRICT · 66,699 people · 2019
Highest in the ZIP: 25.65 µg/L — CROSS VALLEY WATER DISTRICT · 24,695 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 16.94 µg/L No EPA limit set Main supplier: WOODINVILLE WATER DISTRICT · 66,699 people · 2019
Highest in the ZIP: 17.67 µg/L — CROSS VALLEY WATER DISTRICT · 24,695 people · 2019 | 2/2 | SYR4 |
| Dibromoacetic Acid | 12.975 µg/L No EPA limit set Highest in the ZIP: CROSS VALLEY WATER DISTRICT · 24,695 people · 2019 | 1/2 | SYR4 |
| Copper | 9.6 µg/L 0.7% of the EPA limit 1300 µg/L Highest in the ZIP: CROSS VALLEY WATER DISTRICT · 24,695 people · 2019 | 1/2 | SYR4 |
| Barium | 7 µg/L 0.4% of the EPA limit 2000 µg/L Highest in the ZIP: CROSS VALLEY WATER DISTRICT · 24,695 people · 2019 | 1/2 | SYR4 |
| Arsenic | 5.6 µg/L 56% of the EPA limit 10 µg/L Highest in the ZIP: CROSS VALLEY WATER DISTRICT · 24,695 people · 2019 | 1/2 | SYR4 |
| Bromodichloromethane | 3.178 µg/L No EPA limit set Main supplier: WOODINVILLE WATER DISTRICT · 66,699 people · 2019
Highest in the ZIP: 5 µg/L — CROSS VALLEY WATER DISTRICT · 24,695 people · 2019 | 2/2 | SYR4 |
| Monochloroacetic Acid | 2.301 µg/L No EPA limit set Main supplier: WOODINVILLE WATER DISTRICT · 66,699 people · 2019
Highest in the ZIP: 4.04 µg/L — CROSS VALLEY WATER DISTRICT · 24,695 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 0.9135 µg/L No EPA limit set Main supplier: WOODINVILLE WATER DISTRICT · 66,699 people · 2019
Highest in the ZIP: 3.975 µg/L — CROSS VALLEY WATER DISTRICT · 24,695 people · 2019 | 2/2 | SYR4 |
| Lead | 3 µg/L 20% of the EPA limit 15 µg/L Highest in the ZIP: CROSS VALLEY WATER DISTRICT · 24,695 people · 2019 | 1/2 | SYR4 |
| Chromium | 2 µg/L 2% of the EPA limit 100 µg/L Highest in the ZIP: CROSS VALLEY WATER DISTRICT · 24,695 people · 2019 | 1/2 | SYR4 |
| Bromoform | 0.6000 µg/L No EPA limit set Highest in the ZIP: CROSS VALLEY WATER DISTRICT · 24,695 people · 2019 | 1/2 | SYR4 |
| PFBS | 0.0094 µg/L No EPA limit set Highest in the ZIP: CROSS VALLEY WATER DISTRICT · 24,695 people · 2025 | 1/2 | UCMR-5 |
| Pfhxa | 0.0064 µg/L No EPA limit set Highest in the ZIP: CROSS VALLEY WATER DISTRICT · 24,695 people · 2025 | 1/2 | UCMR-5 |
| Pfpea | 0.0049 µg/L No EPA limit set Highest in the ZIP: CROSS VALLEY WATER DISTRICT · 24,695 people · 2025 | 1/2 | UCMR-5 |
| Lead | 0.0031 mg/L 21% of the EPA limit 0.0150 mg/L Highest in the ZIP: CROSS VALLEY WATER DISTRICT · 24,695 people · 2024 | 1/2 | 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 98072
| Supplier | State | Population served |
|---|---|---|
| WOODINVILLE WATER DISTRICT | WA | 66,699 |
| CROSS VALLEY WATER DISTRICT | WA | 24,695 |
Frequently asked questions about ZIP 98072 tap water
Is the tap water in ZIP 98072 safe to drink?
EPA testing detected 22 contaminants across the water suppliers serving ZIP 98072. 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 98072?
2 public water suppliers report EPA drinking-water monitoring for ZIP 98072. Each is listed above with its population served.
What contaminants are in ZIP 98072's water?
EPA monitoring detected Nitrate-Nitrite, Nitrate, Fluoride, TTHM, Chloroform, and others across this ZIP's suppliers. The full list with levels and sources is above.