10 community water systems serve or are based in ZIP 21811. Showing Ocean Pines, the largest by reported population served. The other systems are summarized below.
- System name
- Ocean Pines
- EPA PWS ID
- MD0230005
- Location
- Berlin, MD
- Population served
- 11,890
- Water source
- Ground water
- Primary EPA source
- EPA ECHO record for MD0230005
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 (Oct. 2024–May 2025) detected 2 of the 30 monitored chemicals in this system's samples. Highest reported PFBA result: 7.8 ppt.
| Chemical | Highest result | EPA legal limit (MCL) | EPA health goal (MCLG) |
|---|---|---|---|
| PFBA perfluorobutanoic acid | 7.8 ppt | No federal MCL | — |
| PFBS perfluorobutanesulfonic acid | 3.7 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): 3.3 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 | Lead & Copper Rule | 2011 |
| Record · missed required testing or reporting | Nitrate | 2019 |
| Record · missed required testing or reporting | Nitrate | 2019 |
| Record · missed required testing or reporting | Nitrate | 2019 |
| Record · missed required testing or reporting | Nitrate | 2019 |
| Record · missed required testing or reporting | Nitrate | 2019 |
| Record · missed required testing or reporting | Total Trihalomethanes (TTHM) | 2023 |
| Record · missed required testing or reporting | Haloacetic Acids (HAA5) | 2023 |
Other systems serving or based in ZIP 21811
| System | EPA PWS ID | People served | Violations |
|---|---|---|---|
| Mystic Harbour | MD0230011 | 5,945 | 2 |
| Town Of Berlin | MD0230001 | 4,500 | 2 |
| Riddle Farm | MD0230019 | 500 | 1 |
| Nantucket Point(Distribution-Delaware) | MD0230020 | 500 | 0 |
| Newark | MD0230002 | 325 | 0 |
| Briddletown Distribution System | MD0230015 | 150 | 0 |
| St. Martins By The Bay | MD0230008 | 120 | 6 |
| Best Rental Housing, Inc. | MD0220012 | 68 | 2 |
| Sunset Lakes LLC | MD0230220 | 48 | 17 |
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.