Granite Glen, WA
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2021-2023). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.
Who runs the water here
Granite Glen serves about 34 people through 15 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Chelan County, Washington. EPA system ID: WA5329055. Ask the utility on your bill for your address in their service line inventory.
Granite Glen's lead record
The highest 90th-percentile result EPA holds for Granite Glen is 0 ppb across 1 monitoring period, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 0 (not detected) |
Where this result ranks
Of the 2,218 Washington systems with a lead result, the median latest reading is 1 ppb; 18 are over 15 ppb right now and 62 have gone over at some point. Granite Glen's reported as 0 (not detected) sits at the 2nd percentile in Washington and the 1st nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Chelan County
45 other systems share Chelan County; 23 of them have a higher latest lead result than Granite Glen. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Wenatchee City Of | 43,690 | 2 ppb |
| Chelan Co Pud 1 | 16,190 | 0 (not detected) |
| Leavenworth City Of | 11,041 | 0 (not detected) |
| Chelan Water Dept City Of | 9,425 | 3.2 ppb |
| Lake Chelan Reclamation District | 6,798 | 0 (not detected) |
| Cashmere Water Department | 5,815 | 5.8 ppb |
| Malaga Water District | 2,478 | 0 (not detected) |
| Chelan Co Pud - Chelan Ridge | 2,429 | 0.7 ppb |
| Alpine Water District | 2,255 | 0.8 ppb |
| Entiat City Of | 1,730 | 0 (not detected) |
What to do in your house
Look up your address in Granite Glen's service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Granite Glen whether it covers that cost before hiring anyone - many utilities now do.
These figures describe homes the utility sampled, not your tap. Only your service line record or a test of your own water answers the question for your house. What a 90th-percentile result does and does not tell you: how to read a lead result. Small systems behave differently: why small systems go over more often.