Chesapeake Ranch Estates: water report for ZIP 20657

3 community water systems serve or are based in ZIP 20657. Showing Chesapeake Ranch Estates, the largest by reported population served. The other systems are summarized below.

System name

Chesapeake Ranch Estates

EPA PWS ID

MD0040004

Location

Lusby, MD

Population served

9,500

Water source

Ground water

Primary EPA source

EPA ECHO record for MD0040004

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 2023–Dec. 2023) 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

The EPA record shows 1 violation, 0 health-based.

Other systems serving or based in ZIP 20657

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.