8 community water systems serve or are based in ZIP 21921. Showing Town Of Elkton, the largest by reported population served. The other systems are summarized below.
- System name
- Town Of Elkton
- EPA PWS ID
- MD0070011
- Location
- Elkton, MD
- Population served
- 15,625
- Water source
- Surface water
- Primary EPA source
- EPA ECHO record for MD0070011
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 (June 2024–June 2025) detected 8 of the 30 monitored chemicals in this system's samples. Highest reported PFOA result: 23.3 ppt.
| Chemical | Highest result | EPA legal limit (MCL) | EPA health goal (MCLG) |
|---|---|---|---|
| PFOA perfluorooctanoic acid | 23.3 ppt | 4 ppt | 0 |
| PFOS perfluorooctanesulfonic acid | 7.1 ppt | 4 ppt | 0 |
| PFHxS perfluorohexanesulfonic acid | 4.4 ppt | 10 ppt | 10 ppt |
| PFPeA perfluoropentanoic acid | 14.4 ppt | No federal MCL | — |
| PFHxA perfluorohexanoic acid | 12.8 ppt | No federal MCL | — |
| PFBS perfluorobutanesulfonic acid | 12.3 ppt | No federal MCL | — |
| PFBA perfluorobutanoic acid | 8.6 ppt | No federal MCL | — |
| PFHpA perfluoroheptanoic acid | 6.5 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. 2022–Dec. 2024): 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 10 violations, 2 health-based.
| Type | Rule / contaminant | Since |
|---|---|---|
| Record · other violation | Surface Water Treatment | 2011 |
| Record · missed required testing or reporting | — | 2025 |
| Record · other violation | — | 2025 |
| Record · other violation | Surface Water Treatment | 2013 |
| Health-based · treatment-technique violation | — | 2025 |
| Health-based · treatment-technique violation | — | 2025 |
| Record · other violation | Surface Water Treatment | 2015 |
| Record · other violation | Surface Water Treatment | 2011 |
| Record · other violation | Surface Water Treatment | 2012 |
| Record · missed required testing or reporting | Lead & Copper Rule | 2016 |
Other systems serving or based in ZIP 21921
| System | EPA PWS ID | People served | Violations |
|---|---|---|---|
| Town Of North East | MD0070016 | 8,600 | 23 |
| Elkton West | MD0070015 | 3,500 | 7 |
| Town Of Rising Sun | MD0070021 | 2,200 | 21 |
| Stoney Chase/ Rock Creek M.H.P.S | MD0070233 | 396 | 4 |
| Sherwood Forest/Forest View Village MHP | MD0070250 | 293 | 27 |
| Golden Kay Apartments | MD0070202 | 148 | 68 |
| Oblates Of St. Francis | MD1071359 | 36 | 1 |
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.