10 community water systems serve or are based in ZIP 20602. Showing Waldorf - Charles County Dpw, the largest by reported population served. The other systems are summarized below.
- System name
- Waldorf - Charles County Dpw
- EPA PWS ID
- MD0080049
- Location
- La Plata, MD
- Population served
- 84,296
- Water source
- Surface water
- Primary EPA source
- EPA ECHO record for MD0080049
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 (July 2024–May 2026) detected 3 of the 30 monitored chemicals in this system's samples. Highest reported PFPeA result: 6 ppt.
| Chemical | Highest result | EPA legal limit (MCL) | EPA health goal (MCLG) |
|---|---|---|---|
| PFPeA perfluoropentanoic acid | 6 ppt | No federal MCL | — |
| PFHxA perfluorohexanoic acid | 5.1 ppt | No federal MCL | — |
| PFBS perfluorobutanesulfonic acid | 3.1 ppt | No federal MCL | — |
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
The EPA record shows 8 violations, 0 health-based.
| Type | Rule / contaminant | Since |
|---|---|---|
| Record · missed required testing or reporting | Nitrate | 2020 |
| Record · missed required testing or reporting | Lead & Copper Rule | 2023 |
| Record · missed required testing or reporting | Radium | 2025 |
| Record · missed required testing or reporting | Radium | 2025 |
| Record · missed required testing or reporting | Lead & Copper Rule | 2008 |
| Record · missed required testing or reporting | Lead & Copper Rule | 2014 |
| Record · missed required testing or reporting | Lead & Copper Rule | 2017 |
| Record · missed required testing or reporting | — | 2015 |
Other systems serving or based in ZIP 20602
| System | EPA PWS ID | People served | Violations |
|---|---|---|---|
| Charles County Gardens Water | MD0080008 | 551 | 6 |
| Kings Manor - White Plains Water Co, Inc | MD0080024 | 372 | 6 |
| Calvert Beach - Decatur Street | MD0040024 | 350 | 5 |
| Pomunk Water Company Distribution System | MD0080084 | 340 | 1 |
| Western Shores | MD0040016 | 200 | 6 |
| Red Hill Water Company, Inc. | MD0080040 | 200 | 5 |
| Oak Hill Water Company, LLC | MD0080034 | 180 | 10 |
| Pomfret Estates - Utilco, Inc. | MD0080037 | 150 | 9 |
| Mount Pleasant Water Co., Inc. | MD0180009 | 150 | 21 |
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.