Eldorado Water, TX
Lead detected, under the action levels
Latest 90th-percentile lead: 2.55 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.
About Eldorado Water
Eldorado Water serves about 120 people through 40 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Matagorda County, Texas. EPA system ID: TX1610024; phone on file: 940-894-3172. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
The highest 90th-percentile result EPA holds for Eldorado Water is 2.55 ppb across 1 monitoring period, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 2.55 ppb |
Where this result ranks
Of the 4,447 Texas systems with a lead result, the median latest reading is 0.28 ppb; 15 are over 15 ppb right now and 202 have gone over at some point. Eldorado Water's 2.55 ppb sits at the 88th percentile in Texas and the 78th nationally (higher means more lead).
Neighbouring systems
24 other systems share Matagorda County; 2 of them have a higher latest lead result than Eldorado Water. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| City Of Bay City | 18,061 | 3.6 ppb |
| City Of Palacios | 4,700 | 0.9 ppb |
| Caney Creek Mud Of Matagorda County | 2,764 | 2.12 ppb |
| Matagorda Wsc | 1,746 | 2.5 ppb |
| Matagorda County Wcid 6 | 1,518 | 0 (not detected) |
| Markham Mud | 1,400 | 0 (not detected) |
| Matagorda County Wcid 5 | 1,128 | 0 (not detected) |
| Tres Palacios Oaks Subdivision | 774 | 1.03 ppb |
| Selkirk Wsc | 678 | 0 (not detected) |
| Wadsworth Wsc | 570 | 0 (not detected) |
Your move
Test your own tap with a certified lab first-draw sample; Montague, TX 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 Eldorado Water 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.