Sienna Mud 6, TX
Lead detected, under the action levels
Latest 90th-percentile lead: 0.6 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.
Sienna Mud 6 at a glance
Sienna Mud 6 serves about 5,184 people through 1,728 service connections, which makes it a medium-sized system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Fort Bend County, Texas. EPA system ID: TX0790491; phone on file: 713-860-6400. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Sienna Mud 6's lead record
Against the period ending 2022 (0.7 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Sienna Mud 6 is 1.2 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0.6 ppb |
| 2022 | 0.7 ppb |
| 2022 | 1.2 ppb |
Against other Texas systems
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. Sienna Mud 6's 0.6 ppb sits at the 56th percentile in Texas and the 45th nationally (higher means more lead).
Neighbouring systems
179 other systems share Fort Bend County; 65 of them have a higher latest lead result than Sienna Mud 6. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| City Of Sugar Land | 80,381 | 1.51 ppb |
| Fort Bend County Wcid 2 | 49,173 | 2.81 ppb |
| City Of Rosenberg | 43,158 | 1.87 ppb |
| City Of Fulshear | 34,000 | 0 (not detected) |
| City Of Richmond | 25,326 | 0 (not detected) |
| Fort Bend County Mud 30 | 16,794 | 0 (not detected) |
| City Of Sugar Land New Territory | 15,546 | 0 (not detected) |
| Fort Bend County Mud 25 | 15,327 | 1.36 ppb |
| Pecan Grove Mud | 14,913 | 1.3 ppb |
| Quail Valley Utility District | 14,409 | 0 (not detected) |
What to do in your house
Test your own tap with a certified lab first-draw sample; Houston, 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 Sienna Mud 6 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.