What was found in ZIP 97140
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 | 2700 µg/L 27% of the EPA limit 10000 µg/L Main supplier: TIGARD, CITY OF · 62,500 people · 2019 | 1/2 | SYR4 |
| Nitrate-Nitrite | 2565 µg/L 26% of the EPA limit 10000 µg/L Main supplier: TIGARD, CITY OF · 62,500 people · 2018 | 1/2 | SYR4 |
| Copper | 427.8 µg/L 33% of the EPA limit 1300 µg/L Main supplier: TIGARD, CITY OF · 62,500 people · 2017 | 2/2 | SYR4 |
| Nitrite | 142 µg/L 14% of the EPA limit 1000 µg/L Main supplier: TIGARD, CITY OF · 62,500 people · 2018 | 1/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 42.07 µg/L 70% of the EPA limit 60 µg/L Main supplier: TIGARD, CITY OF · 62,500 people · 2019 | 2/2 | SYR4 |
| TTHM | 40.795 µg/L 51% of the EPA limit 80 µg/L Main supplier: TIGARD, CITY OF · 62,500 people · 2019 | 2/2 | SYR4 |
| Lead | 23 µg/L 153% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: TIGARD, CITY OF · 62,500 people · 2017 | 2/2 | SYR4 |
| Barium | 4.661 µg/L 0.2% of the EPA limit 2000 µg/L Main supplier: TIGARD, CITY OF · 62,500 people · 2017 | 1/2 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 1.7 µg/L 28% of the EPA limit 6 µg/L Main supplier: TIGARD, CITY OF · 62,500 people · 2018 | 1/2 | SYR4 |
| Combined Radium (-226 And -228) | 1.11 pCi/L 22% of the EPA limit 5 pCi/L Main supplier: TIGARD, CITY OF · 62,500 people · 2017 | 1/2 | SYR4 |
| 6:2 Fts | 0.0413 µg/L No EPA limit set Highest in the ZIP: SHERWOOD, CITY OF · 19,885 people · 2025 | 1/2 | UCMR-5 |
| 8:2 Fts | 0.0080 µg/L No EPA limit set Highest in the ZIP: SHERWOOD, CITY OF · 19,885 people · 2025 | 1/2 | UCMR-5 |
| Lead | 0.00085 mg/L 5.7% of the EPA limit 0.0150 mg/L Main supplier: TIGARD, CITY OF · 62,500 people · 2023
Highest in the ZIP: 0.0013 mg/L — SHERWOOD, CITY OF · 19,885 people · 2025 | 2/2 | 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 97140
| Supplier | State | Population served |
|---|---|---|
| TIGARD, CITY OF | OR | 62,500 |
| SHERWOOD, CITY OF | OR | 19,885 |
Frequently asked questions about ZIP 97140 tap water
Is the tap water in ZIP 97140 safe to drink?
EPA testing detected 13 contaminants across the water suppliers serving ZIP 97140. 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 97140?
2 public water suppliers report EPA drinking-water monitoring for ZIP 97140. Each is listed above with its population served.
What contaminants are in ZIP 97140's water?
EPA monitoring detected Nitrate, Nitrate-Nitrite, Copper, Nitrite, Total Haloacetic Acids (HAA5), and others across this ZIP's suppliers. The full list with levels and sources is above.