Delynn Water System, TX
Exceeded the action level in the past
Latest 90th-percentile lead: 5.3 ppb (monitoring period 2022-2024). 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.
Delynn Water System at a glance
Delynn Water System serves about 55 people through 26 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Harris County, Texas. EPA system ID: TX1010469. Ask the utility on your bill for your address in their service line inventory.
Lead results over time
That is down 11.7 ppb from 17 ppb in the period ending 2019. The highest 90th-percentile result EPA holds for Delynn Water System is 17 ppb across 2 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 5.3 ppb |
| 2019 | 17 ppb over 15 |
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. Delynn Water System's 5.3 ppb sits at the 97th percentile in Texas and the 92nd nationally (higher means more lead).
Nearby utilities
690 other systems share Harris County; 14 of them have a higher latest lead result than Delynn Water System. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| City Of Houston | 2,970,543 | 5 ppb |
| City Of Pasadena | 152,000 | 3.72 ppb |
| Clear Lake City Water Authority | 89,702 | 0.88 ppb |
| City Of Baytown | 86,004 | 2.1 ppb |
| City Of Houston Ud 5 - Kingwood | 80,073 | 0.51 ppb |
| Harris County Mud 165 | 40,503 | 1.3 ppb |
| City Of La Porte | 36,569 | 2.35 ppb |
| City Of Deer Park | 34,495 | 0 (not detected) |
| Northwest Harris County Mud 5 | 25,425 | 0 (not detected) |
| City Of Katy | 25,253 | 2.7 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; New Caney, 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 Delynn Water System 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. Why an old exceedance still matters: over the limit before, under it now.