What was found in ZIP 97124
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 | 756 µg/L 7.6% of the EPA limit 10000 µg/L Main supplier: TUALATIN VALLEY WATER DISTRICT · 224,600 people · 2019
Highest in the ZIP: 1000 µg/L — KOHALA RANCH WATER CO. · 850 people · 2019 | 2/3 | SYR4 |
| Nitrate-Nitrite | 695.5 µg/L 7% of the EPA limit 10000 µg/L Main supplier: TUALATIN VALLEY WATER DISTRICT · 224,600 people · 2019
Highest in the ZIP: 1000 µg/L — KOHALA RANCH WATER CO. · 850 people · 2019 | 2/3 | SYR4 |
| Fluoride | 656 µg/L 16% of the EPA limit 4000 µg/L Main supplier: TUALATIN VALLEY WATER DISTRICT · 224,600 people · 2019 | 1/3 | SYR4 |
| Copper | 413.5 µg/L 32% of the EPA limit 1300 µg/L Main supplier: TUALATIN VALLEY WATER DISTRICT · 224,600 people · 2019 | 3/3 | SYR4 |
| Lead | 22.7 µg/L 151% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: TUALATIN VALLEY WATER DISTRICT · 224,600 people · 2019
Highest in the ZIP: 117.19 µg/L — KOHALA RANCH WATER CO. · 850 people · 2019 | 3/3 | SYR4 |
| TTHM | 45.9 µg/L 57% of the EPA limit 80 µg/L Main supplier: TUALATIN VALLEY WATER DISTRICT · 224,600 people · 2019
Highest in the ZIP: 51.09 µg/L — HILLSBORO, CITY OF · 92,632 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 43.2 µg/L 72% of the EPA limit 60 µg/L Main supplier: TUALATIN VALLEY WATER DISTRICT · 224,600 people · 2019 | 2/3 | SYR4 |
| Bromoform | 16.875 µg/L No EPA limit set Highest in the ZIP: KOHALA RANCH WATER CO. · 850 people · 2019 | 1/3 | SYR4 |
| Gross Beta Particle Activity | 0.9980 pCi/L No EPA limit set Main supplier: TUALATIN VALLEY WATER DISTRICT · 224,600 people · 2018
Highest in the ZIP: 5.74 pCi/L — KOHALA RANCH WATER CO. · 850 people · 2019 | 2/3 | SYR4 |
| Gross Alpha, Excl. Radon And U | 4.4 pCi/L 29% of the EPA limit 15 pCi/L Highest in the ZIP: KOHALA RANCH WATER CO. · 850 people · 2019 | 1/3 | SYR4 |
| Barium | 3.585 µg/L 0.2% of the EPA limit 2000 µg/L Main supplier: TUALATIN VALLEY WATER DISTRICT · 224,600 people · 2019 | 1/3 | SYR4 |
| Chromium | 2.864 µg/L 2.9% of the EPA limit 100 µg/L Main supplier: TUALATIN VALLEY WATER DISTRICT · 224,600 people · 2019 | 2/3 | SYR4 |
| Combined Uranium | 0.0880 µg/L 0.3% of the EPA limit 30 µg/L Main supplier: TUALATIN VALLEY WATER DISTRICT · 224,600 people · 2018 | 1/3 | SYR4 |
| Lead | 0.0045 mg/L 30% of the EPA limit 0.0150 mg/L Main supplier: TUALATIN VALLEY WATER DISTRICT · 224,600 people · 2025
Highest in the ZIP: 0.0107 mg/L — KOHALA RANCH WATER CO. · 850 people · 2021 | 3/3 | 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 97124
| Supplier | State | Population served |
|---|---|---|
| TUALATIN VALLEY WATER DISTRICT | OR | 224,600 |
| HILLSBORO, CITY OF | OR | 92,632 |
| KOHALA RANCH WATER CO. | HI | 850 |
Frequently asked questions about ZIP 97124 tap water
Is the tap water in ZIP 97124 safe to drink?
EPA testing detected 14 contaminants across the water suppliers serving ZIP 97124. 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 97124?
3 public water suppliers report EPA drinking-water monitoring for ZIP 97124. Each is listed above with its population served.
What contaminants are in ZIP 97124's water?
EPA monitoring detected Nitrate, Nitrate-Nitrite, Fluoride, Copper, Lead, and others across this ZIP's suppliers. The full list with levels and sources is above.