10 community water systems serve or are based in ZIP 20646. Showing Town Of La Plata. The other systems are summarized below.
- System name
- Town Of La Plata
- EPA PWS ID
- MD0080025
- Location
- La Plata, MD
- Population served
- 11,535
- Water source
- Ground water
- Primary EPA source
- EPA ECHO record for MD0080025
Make sure this is the system tied to your address before using these results to make a decision about your own water. A ZIP code is not a street address.
EPA lab monitoring (UCMR 5)
EPA UCMR 5 monitoring (May 2025–Nov. 2025) checked this system for 30 chemicals (29 PFAS and lithium) and detected none above EPA's minimum reporting levels.
UCMR 5 results are monitoring data, not a compliance determination. PFAS compliance is governed by separate EPA drinking-water rules. Some PFAS rule changes are proposed for 2026 — see what's proposed.
Lead at customer taps
Lead at sampled customer taps, 90th percentile (Jan. 2021–Dec. 2023): 0 ppb. EPA's current action level is 15 ppb; its health goal (MCLG) is 0.
Lead is regulated with an action level rather than a standard MCL. EPA's lead action level is 15 ppb today; the Lead and Copper Rule Improvements lower it to 10 ppb starting Nov. 1, 2027.
Violations on the federal record
No violations on the recent federal record. “Compliant” means it stays under federal legal limits, which aren't always the same as EPA's health goals.
Other systems serving or based in ZIP 20646
| System | EPA PWS ID | People served | Violations |
|---|---|---|---|
| Waldorf - Charles County Dpw | MD0080049 | 84,296 | 8 |
| Bryans Road | MD0080033 | 6,260 | 5 |
| Swan Point | MD0080046 | 945 | 6 |
| Cliffton On The Potomac | MD0080009 | 744 | 8 |
| Hunters Brooke/Falcon Ridge Subd | MD0080083 | 614 | 4 |
| Benedict | MD0080062 | 376 | 4 |
| Bel Alton | MD0080005 | 311 | 6 |
| Chapel Point Wds/ Jude House/ Comm Ctr | MD0080064 | 280 | 5 |
| Ellenwood | MD0080057 | 229 | 5 |
On a private well? EPA public-system data does not describe your individual well. Test your water directly.
What the numbers mean
EPA uses two different benchmarks: the legal limit (MCL) and the health goal (MCLG). They are not always the same number. Read EPA's explanation →
Open the interactive report →What the government says
Sources: U.S. EPA SDWIS (system record and violations, queried live) · EPA UCMR 5 final dataset · EPA SDWIS lead & copper 90th-percentile results. EPA data can lag the latest tests.