What was found in ZIP 99217
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 | 3327.5 µg/L 33% of the EPA limit 10000 µg/L Main supplier: SPOKANE CITY OF · 346,138 people · 2019
Highest in the ZIP: 6800 µg/L — SPO CO WATER DIST 3 SYS 4 · 6,233 people · 2019 | 3/3 | SYR4 |
| Nitrate-Nitrite | 2553 µg/L 26% of the EPA limit 10000 µg/L Main supplier: SPOKANE CITY OF · 346,138 people · 2019
Highest in the ZIP: 5361.5 µg/L — TRENTWOOD IRRIGATION DISTRICT 3 · 4,228 people · 2014 | 3/3 | SYR4 |
| Fluoride | 240 µg/L 6% of the EPA limit 4000 µg/L Highest in the ZIP: SPO CO WATER DIST 3 SYS 4 · 6,233 people · 2019 | 1/3 | SYR4 |
| Barium | 48.43 µg/L 2.4% of the EPA limit 2000 µg/L Main supplier: SPOKANE CITY OF · 346,138 people · 2019
Highest in the ZIP: 73.02 µg/L — TRENTWOOD IRRIGATION DISTRICT 3 · 4,228 people · 2014 | 3/3 | SYR4 |
| Copper | 8.4955 µg/L 0.7% of the EPA limit 1300 µg/L Main supplier: SPOKANE CITY OF · 346,138 people · 2019
Highest in the ZIP: 18.615 µg/L — TRENTWOOD IRRIGATION DISTRICT 3 · 4,228 people · 2014 | 2/3 | SYR4 |
| TTHM | 4.816 µg/L 6% of the EPA limit 80 µg/L Main supplier: SPOKANE CITY OF · 346,138 people · 2019
Highest in the ZIP: 6.4315 µg/L — SPO CO WATER DIST 3 SYS 4 · 6,233 people · 2016 | 2/3 | SYR4 |
| Arsenic | 4.782 µg/L 48% of the EPA limit 10 µg/L Main supplier: SPOKANE CITY OF · 346,138 people · 2019
Highest in the ZIP: 5.035 µg/L — TRENTWOOD IRRIGATION DISTRICT 3 · 4,228 people · 2014 | 3/3 | SYR4 |
| Lead | 2.6695 µg/L 18% of the EPA limit 15 µg/L Main supplier: SPOKANE CITY OF · 346,138 people · 2019
Highest in the ZIP: 4.39 µg/L — TRENTWOOD IRRIGATION DISTRICT 3 · 4,228 people · 2014 | 2/3 | SYR4 |
| Chromium | 1.3085 µg/L 1.3% of the EPA limit 100 µg/L Main supplier: SPOKANE CITY OF · 346,138 people · 2019
Highest in the ZIP: 3.6 µg/L — TRENTWOOD IRRIGATION DISTRICT 3 · 4,228 people · 2014 | 2/3 | SYR4 |
| Chloroform | 0.8945 µg/L No EPA limit set Main supplier: SPOKANE CITY OF · 346,138 people · 2019
Highest in the ZIP: 3.502 µg/L — SPO CO WATER DIST 3 SYS 4 · 6,233 people · 2019 | 2/3 | SYR4 |
| Combined Uranium | 3.1995 µg/L 11% of the EPA limit 30 µg/L Highest in the ZIP: SPO CO WATER DIST 3 SYS 4 · 6,233 people · 2016 | 1/3 | SYR4 |
| Dibromochloromethane | 1.922 µg/L No EPA limit set Main supplier: SPOKANE CITY OF · 346,138 people · 2019 | 2/3 | SYR4 |
| Bromodichloromethane | 1.376 µg/L No EPA limit set Main supplier: SPOKANE CITY OF · 346,138 people · 2019
Highest in the ZIP: 1.8925 µg/L — SPO CO WATER DIST 3 SYS 4 · 6,233 people · 2019 | 2/3 | SYR4 |
| Bromoform | 1.6475 µg/L No EPA limit set Main supplier: SPOKANE CITY OF · 346,138 people · 2019 | 2/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 1.44 µg/L 2.4% of the EPA limit 60 µg/L Highest in the ZIP: SPO CO WATER DIST 3 SYS 4 · 6,233 people · 2018 | 1/3 | SYR4 |
| Trichloroacetic Acid | 1.44 µg/L No EPA limit set Highest in the ZIP: SPO CO WATER DIST 3 SYS 4 · 6,233 people · 2019 | 1/3 | SYR4 |
| Selenium | 1.15 µg/L 2.3% of the EPA limit 50 µg/L Main supplier: SPOKANE CITY OF · 346,138 people · 2019 | 1/3 | SYR4 |
| Mercury | 0.2190 µg/L 11% of the EPA limit 2 µg/L Main supplier: SPOKANE CITY OF · 346,138 people · 2019 | 1/3 | SYR4 |
| PFOS | 0.0061 µg/L No EPA limit set Main supplier: SPOKANE CITY OF · 346,138 people · 2025
Highest in the ZIP: 0.0120 µg/L — TRENTWOOD IRRIGATION DISTRICT 3 · 4,228 people · 2024 | 2/3 | UCMR-5 |
| PFOA | 0.0051 µg/L No EPA limit set Highest in the ZIP: TRENTWOOD IRRIGATION DISTRICT 3 · 4,228 people · 2024 | 1/3 | UCMR-5 |
| PFBS | 0.0039 µg/L No EPA limit set Main supplier: SPOKANE CITY OF · 346,138 people · 2025
Highest in the ZIP: 0.0049 µg/L — TRENTWOOD IRRIGATION DISTRICT 3 · 4,228 people · 2024 | 2/3 | UCMR-5 |
| Pfhxa | 0.0035 µg/L No EPA limit set Main supplier: SPOKANE CITY OF · 346,138 people · 2025
Highest in the ZIP: 0.0040 µg/L — TRENTWOOD IRRIGATION DISTRICT 3 · 4,228 people · 2024 | 2/3 | UCMR-5 |
| Pfpea | 0.0033 µg/L No EPA limit set Main supplier: SPOKANE CITY OF · 346,138 people · 2025
Highest in the ZIP: 0.0039 µg/L — TRENTWOOD IRRIGATION DISTRICT 3 · 4,228 people · 2024 | 2/3 | UCMR-5 |
| Lead | 0.0020 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: SPOKANE CITY OF · 346,138 people · 2024
Highest in the ZIP: 0.0025 mg/L — TRENTWOOD IRRIGATION DISTRICT 3 · 4,228 people · 2023 | 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 99217
| Supplier | State | Population served |
|---|---|---|
| SPOKANE CITY OF | WA | 346,138 |
| SPO CO WATER DIST 3 SYS 4 | WA | 6,233 |
| TRENTWOOD IRRIGATION DISTRICT 3 | WA | 4,228 |
Frequently asked questions about ZIP 99217 tap water
Is the tap water in ZIP 99217 safe to drink?
EPA testing detected 24 contaminants across the water suppliers serving ZIP 99217. 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 99217?
3 public water suppliers report EPA drinking-water monitoring for ZIP 99217. Each is listed above with its population served.
What contaminants are in ZIP 99217's water?
EPA monitoring detected Nitrate, Nitrate-Nitrite, Fluoride, Barium, Copper, and others across this ZIP's suppliers. The full list with levels and sources is above.