Marshland Water Association, OR
Lead detected, under the action levels
Latest 90th-percentile lead: 5.04 ppb (monitoring period 2025-2027). 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
Marshland Water Association serves about 70 people through 29 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws surface water, in Columbia County, Oregon. EPA system ID: OR4101449; phone on file: 503-728-1328. They can tell you what your service line is made of and whether they pay to replace it.
Marshland Water Association's lead record
That is up 5.04 ppb from 0 ppb in the period ending 2026. The highest 90th-percentile result EPA holds for Marshland Water Association is 6 ppb across 5 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2027 | 5.04 ppb |
| 2026 | 0 (not detected) |
| 2023 | 0 (not detected) |
| 2020 | 6 ppb |
| 2017 | 5 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. Marshland Water Association's 5.04 ppb sits at the 90th percentile in Oregon and the 91st nationally (higher means more lead).
Nearby utilities
37 other systems share Columbia County; 4 of them have a higher latest lead result than Marshland Water Association. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| St Helens, City Of | 13,410 | 1.03 ppb |
| Scappoose, City Of | 8,710 | 0 (not detected) |
| Mcnulty Water Pud | 2,500 | 0 (not detected) |
| Vernonia, City Of | 2,100 | 0 (not detected) |
| Clatskanie, City Of | 2,096 | 1.27 ppb |
| Warren Water Association | 2,050 | 0 (not detected) |
| Columbia City Mun Waterworks | 1,995 | 0 (not detected) |
| City Of Rainier | 1,932 | 0 (not detected) |
| Western Hills Mh Estates | 375 | 0 (not detected) |
| Fishhawk Lake Reserve And Community | 350 | 6.25 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Clatskanie, 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 Marshland Water Association 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. Size matters more than most people expect: small vs large water systems.