Monument, City Of, OR
Lead detected, under the action levels
Latest 90th-percentile lead: 0.91 ppb (monitoring period 2025-2025). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. Lead was measured in sampled homes but the 90th percentile is under both action levels. EPA's health goal for lead is zero, so test your own tap if your home was built before 1986 or anyone in it is pregnant or a young child.
Who runs the water here
Monument, City Of serves about 115 people through 91 service connections, which makes it a very small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Grant County, Oregon. EPA system ID: OR4100541; phone on file: 541-934-2025. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Monument, City Of's lead record
Against the period ending 2024 (1.2 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Monument, City Of is 12 ppb across 11 monitoring periods, none of them over 15 ppb (2 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0.91 ppb |
| 2024 | 1.2 ppb |
| 2023 | 1.99 ppb |
| 2023 | 2.26 ppb |
| 2022 | 1.16 ppb |
| 2022 | 5.37 ppb |
| 2021 | 2.26 ppb |
| 2020 | 1.16 ppb |
| 2019 | 12 ppb over 10 |
| 2017 | 12 ppb over 10 |
| 2016 | 3.59 ppb |
How Monument, City Of compares
Of the 909 Oregon systems with a lead result, the median latest reading is 1 ppb; 15 are over 15 ppb right now and 71 have gone over at some point. Monument, City Of's 0.91 ppb sits at the 48th percentile in Oregon and the 49th nationally (higher means more lead).
Other water systems in Grant County
7 other systems share Grant County; 7 of them have a higher latest lead result than Monument, City Of. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| John Day, City Of | 1,617 | 1.7 ppb |
| Prairie City | 841 | 1.43 ppb |
| Canyon City Water Department | 666 | 1.86 ppb |
| Mount Vernon, City Of | 510 | 1.25 ppb |
| Seneca, City Of | 200 | 1.05 ppb |
| Long Creek, City Of | 173 | 2.12 ppb |
| Dayville, City Of | 155 | 1.28 ppb |
Next steps for Monument, OR
Test your own tap with a certified lab first-draw sample; Monument, OR may offer free or low-cost kits through the utility. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Monument, City Of whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 2150 ppb (copper action level 1,300 ppb).
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. The action level is dropping - the 10 ppb rule from 2027.