Grande Casa, MO
Lead detected, under the action levels
Latest 90th-percentile lead: 2.25 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. 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.
Grande Casa at a glance
Grande Casa serves about 501 people through 167 service connections, which makes it a small system under EPA's size classes. It is privately owned and draws groundwater, in Ellis County, Missouri. EPA system ID: TX0700063; phone on file: 254-355-9124. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
The highest 90th-percentile result EPA holds for Grande Casa is 2.25 ppb across 1 monitoring period, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 2.25 ppb |
Where this result ranks
Of the 1,674 Missouri systems with a lead result, the median latest reading is 1.04 ppb; 2 are over 15 ppb right now and 74 have gone over at some point. Grande Casa's 2.25 ppb sits at the 74th percentile in Missouri and the 75th nationally (higher means more lead).
Nearby utilities
7 other systems share Ellis County; 2 of them have a higher latest lead result than Grande Casa. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Spanish Grant Subdivision | 444 | 1.6 ppb |
| Red Oak Community Water Service | 321 | 0 (not detected) |
| Lakeview Ranchettes | 309 | 1.92 ppb |
| Lakeview Water System | 216 | 0 (not detected) |
| Chambers Meadow Estate Water | 198 | 3.37 ppb |
| Emerald Forest | 180 | 3.9 ppb |
| Howard Water Coop | 138 | 0 (not detected) |
What to do in your house
Test your own tap with a certified lab first-draw sample; Saint Louis, MO 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 Grande Casa 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. Systems that went over once often dip back under; here is what that means.