Ponderosa Mobile Home Park, WA
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2023-2025). 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
Ponderosa Mobile Home Park serves about 105 people through 37 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Grant County, Washington. EPA system ID: WA5368420. Ask the utility on your bill for your address in their service line inventory.
Every lead result on file
That is down 1.1 ppb from 1.1 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Ponderosa Mobile Home Park is 4.2 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2022 | 1.1 ppb |
| 2019 | 4.2 ppb |
| 2016 | 1 ppb |
How Ponderosa Mobile Home Park compares
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. Ponderosa Mobile Home Park's reported as 0 (not detected) sits at the 15th percentile in Washington and the 10th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Grant County
80 other systems share Grant County; 28 of them have a higher latest lead result than Ponderosa Mobile Home Park. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Moses Lake City Of | 32,428 | 3.2 ppb |
| Ephrata Water Department | 8,718 | 0 (not detected) |
| Quincy Water Department City Of | 8,415 | 2.5 ppb |
| Mattawa City Of | 5,370 | 0 (not detected) |
| Warden City Of | 4,674 | 0 (not detected) |
| Royal City Water | 3,389 | 3 ppb |
| Desert Aire Owner Assn | 2,856 | 1 ppb |
| Soap Lake Water Dept | 2,399 | 0 (not detected) |
| Electric City City Of | 1,812 | 2.6 ppb |
| Sunland Estates Homeowners Assn | 1,480 | 0 (not detected) |
What to do in your house
Look up your address in Ponderosa Mobile Home Park'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 Ponderosa Mobile Home Park 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. The lead result guide covers how utilities pick the homes they sample. Small systems behave differently: why small systems go over more often.