Monterey Rural Water System Inc, LA
Lead detected, under the action levels
Latest 90th-percentile lead: 2 ppb (monitoring period 2026-2026). 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.
Who runs the water here
Monterey Rural Water System Inc serves about 5,250 people through 1,750 service connections, which makes it a medium-sized system under EPA's size classes. It is privately owned and draws groundwater, in Concordia Parish County, Louisiana. EPA system ID: LA1029007; phone on file: 318-386-2232. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Monterey Rural Water System Inc's lead record
That is down 7.3 ppb from 9.3 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Monterey Rural Water System Inc is 9.3 ppb across 5 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 2 ppb |
| 2025 | 9.3 ppb |
| 2022 | 4 ppb |
| 2019 | 8 ppb |
| 2016 | 2 ppb |
How Monterey Rural Water System Inc compares
Of the 802 Louisiana systems with a lead result, the median latest reading is 0.72 ppb; 4 are over 15 ppb right now and 30 have gone over at some point. Monterey Rural Water System Inc's 2 ppb sits at the 80th percentile in Louisiana and the 72nd nationally (higher means more lead).
Neighbouring systems
6 other systems share Concordia Parish County; 2 of them have a higher latest lead result than Monterey Rural Water System Inc. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Concordia Waterworks District 1 | 6,921 | 3 ppb |
| Town Of Vidalia Water System | 6,354 | 1 ppb |
| Town Of Ferriday Water System | 3,816 | 11.4 ppb |
| Lake St John Waterworks District 1 | 2,067 | 0 (not detected) |
| Village Of Clayton Water System | 723 | 2 ppb |
| Village Of Ridgecrest Water Supply | 684 | 1.8 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Monterey, LA 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 Monterey Rural Water System Inc whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 1700 ppb (copper action level 1,300 ppb).
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. The action level is dropping - the 10 ppb rule from 2027.