Monroe, City Of, OR
Exceeded the action level in the past
Latest 90th-percentile lead: 1.5 ppb (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 result is under the action level, but this system has gone over 15 ppb before. Lead comes from pipes, not the source water, so a home with a lead service line can still be exposed. Test your own tap.
Monroe, City Of at a glance
Monroe, City Of serves about 723 people through 343 service connections, which makes it a small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Benton County, Oregon. EPA system ID: OR4100540; phone on file: 541-995-6655. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
That is down 1.4 ppb from 2.9 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Monroe, City Of is 20 ppb across 9 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1.5 ppb |
| 2022 | 2.9 ppb |
| 2021 | 2.5 ppb |
| 2020 | 2.4 ppb |
| 2019 | 2 ppb |
| 2019 | 2 ppb |
| 2018 | 7 ppb |
| 2017 | 20 ppb over 15 |
| 2016 | 2 ppb |
Against other Oregon systems
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. Monroe, City Of's 1.5 ppb sits at the 61st percentile in Oregon and the 64th nationally (higher means more lead).
Nearby utilities
14 other systems share Benton County; 8 of them have a higher latest lead result than Monroe, City Of. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Corvallis, City Of | 61,468 | 1.9 ppb |
| Philomath Public Works | 4,670 | 3.3 ppb |
| Adair Village Water System | 875 | 1.9 ppb |
| Knoll Terrace Park | 452 | 1.1 ppb |
| Vineyard Mountain Water | 325 | 4.56 ppb |
| Alsea County Service District | 202 | 3.2 ppb |
| Fir View Water Company | 150 | 4.2 ppb |
| Columbia Place Llc | 125 | 0 (not detected) |
| Cascade View Estates | 113 | 0 (not detected) |
| North Corvallis Mhp-Well #1 | 100 | 6.4 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Harrisburg, 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 Monroe, City Of 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. More in what a past exceedance means today.