Royal Lake Estates, MO
Exceeded the action level in the past
Latest 90th-percentile lead: 9.2 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. 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.
Who runs the water here
Royal Lake Estates serves about 52 people through 15 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Cape Girardeau County, Missouri. EPA system ID: MO4031334; phone on file: 573-225-5253. They can tell you what your service line is made of and whether they pay to replace it.
Royal Lake Estates's lead record
That is up 6.85 ppb from 2.35 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Royal Lake Estates is 23 ppb across 6 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 9.2 ppb |
| 2022 | 2.35 ppb |
| 2022 | 2.35 ppb |
| 2019 | 2.14 ppb |
| 2019 | 3.08 ppb |
| 2018 | 23 ppb over 15 |
Against other Missouri systems
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. Royal Lake Estates's 9.2 ppb sits at the 98th percentile in Missouri and the 97th nationally (higher means more lead).
Nearby utilities
20 other systems share Cape Girardeau County; 0 of them have a higher latest lead result than Royal Lake Estates. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Cape Girardeau Pws | 39,941 | 3.57 ppb |
| Jackson Pws | 15,000 | 1.03 ppb |
| Cape Perry County Pwsd 1 South | 8,545 | 2.32 ppb |
| Cape Girardeau County Pwsd 2 | 2,913 | 5.09 ppb |
| Cape Girardeau County Pwsd 4 | 1,743 | 1.1 ppb |
| Hillcrest Utility Operating Company Inc | 700 | 1.8 ppb |
| Cape Girardeau County Pwsd 5 | 485 | 0.93 ppb |
| Delta Pws | 480 | 2.29 ppb |
| Parkwood Estates Llc | 350 | 2.16 ppb |
| Whitewater Allenville Pws | 200 | 2.33 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Cape Girardeau, 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 Royal Lake Estates 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. More in what a past exceedance means today.