Maryland · ZIP 21114 · EPA OH7703812

Is this in Crofton's water?

Rex Hill Estates, LLC · serves 246 people · groundwater · 101 connections
8
violations on the federal EPA record
1
health-based — a protective limit exceeded
246
people drink this water every day

This system has 1 health-based violation on the EPA record — involving Haloacetic Acids (HAA5), Lead & Copper Rule, Surface Water Treatment. A limit meant to protect health, exceeded.

Haloacetic Acids (HAA5)

Haloacetic acids are disinfection byproducts formed when chlorine treats water; five are federally capped as a group.

Read the rule → EPA · Disinfection Byproducts Rules
Lead & Copper Rule

The Lead & Copper Rule requires utilities to test water at customer taps for lead and copper — metals that enter water from pipes and plumbing, not the source. Lead harms brain development in children; no level is considered safe.

Read the rule → EPA · Lead & Copper Rule
Surface Water Treatment

The Surface Water Treatment Rules require utilities using surface water (or groundwater under its influence) to filter and disinfect against microbes like Giardia, Legionella and viruses.

Read the rule → EPA · Surface Water Treatment Rules
Total Trihalomethanes (TTHM)

Total trihalomethanes are cancer-linked byproducts formed when chlorine disinfects water; federal rules cap them and require regular testing.

Read the rule → EPA · Disinfection Byproducts Rules

The federal record.

HEALTHtreatment-technique violationLead & Copper Rule1994

The utility failed to carry out a treatment process the rule requires — the safeguard itself wasn't run properly.

Lead & Copper Rule: The Lead & Copper Rule requires utilities to test water at customer taps for lead and copper — metals that enter water from pipes and plumbing, not the source. Lead harms brain development in children; no level is considered safe.

Read the rule → EPA · Lead & Copper Rule
Who is responsibleRex Hill Estates, LLC · attn Harker, Kirsten — the utility is required to answer questions about its record. Ask them about it.Their office: 2151 Priest Bridge Dr, Crofton ↗
RECORDmissed required testing or reportingLead & Copper Rule2009

The utility didn't complete required testing or paperwork on time. The water wasn't necessarily bad — but what isn't measured can't be caught.

Lead & Copper Rule: The Lead & Copper Rule requires utilities to test water at customer taps for lead and copper — metals that enter water from pipes and plumbing, not the source. Lead harms brain development in children; no level is considered safe.

Read the rule → EPA · Lead & Copper Rule
Who is responsibleRex Hill Estates, LLC · attn Harker, Kirsten — the utility is required to answer questions about its record. Ask them about it.Their office: 2151 Priest Bridge Dr, Crofton ↗
RECORDother violationSurface Water Treatment2019

A violation on the federal record outside the standard categories.

Surface Water Treatment: The Surface Water Treatment Rules require utilities using surface water (or groundwater under its influence) to filter and disinfect against microbes like Giardia, Legionella and viruses.

Read the rule → EPA · Surface Water Treatment Rules
Who is responsibleRex Hill Estates, LLC · attn Harker, Kirsten — the utility is required to answer questions about its record. Ask them about it.Their office: 2151 Priest Bridge Dr, Crofton ↗
RECORDmissed required testing or reportingTotal Trihalomethanes (TTHM)2021

The utility didn't complete required testing or paperwork on time. The water wasn't necessarily bad — but what isn't measured can't be caught.

Total Trihalomethanes (TTHM): Total trihalomethanes are cancer-linked byproducts formed when chlorine disinfects water; federal rules cap them and require regular testing.

Read the rule → EPA · Disinfection Byproducts Rules
Who is responsibleRex Hill Estates, LLC · attn Harker, Kirsten — the utility is required to answer questions about its record. Ask them about it.Their office: 2151 Priest Bridge Dr, Crofton ↗
RECORDmissed required testing or reportingHaloacetic Acids (HAA5)2021

The utility didn't complete required testing or paperwork on time. The water wasn't necessarily bad — but what isn't measured can't be caught.

Haloacetic Acids (HAA5): Haloacetic acids are disinfection byproducts formed when chlorine treats water; five are federally capped as a group.

Read the rule → EPA · Disinfection Byproducts Rules
Who is responsibleRex Hill Estates, LLC · attn Harker, Kirsten — the utility is required to answer questions about its record. Ask them about it.Their office: 2151 Priest Bridge Dr, Crofton ↗
RECORDother violationSurface Water Treatment2022

A violation on the federal record outside the standard categories.

Surface Water Treatment: The Surface Water Treatment Rules require utilities using surface water (or groundwater under its influence) to filter and disinfect against microbes like Giardia, Legionella and viruses.

Read the rule → EPA · Surface Water Treatment Rules
Who is responsibleRex Hill Estates, LLC · attn Harker, Kirsten — the utility is required to answer questions about its record. Ask them about it.Their office: 2151 Priest Bridge Dr, Crofton ↗
RECORDother violation2022

A violation on the federal record outside the standard categories.

Who is responsibleRex Hill Estates, LLC · attn Harker, Kirsten — the utility is required to answer questions about its record. Ask them about it.Their office: 2151 Priest Bridge Dr, Crofton ↗
RECORDother violationSurface Water Treatment2025

A violation on the federal record outside the standard categories.

Surface Water Treatment: The Surface Water Treatment Rules require utilities using surface water (or groundwater under its influence) to filter and disinfect against microbes like Giardia, Legionella and viruses.

Read the rule → EPA · Surface Water Treatment Rules
Who is responsibleRex Hill Estates, LLC · attn Harker, Kirsten — the utility is required to answer questions about its record. Ask them about it.Their office: 2151 Priest Bridge Dr, Crofton ↗

Source: U.S. EPA Safe Drinking Water Information System (SDWIS), system OH7703812. “Compliant” means clearing federal limits — many unchanged for ~20 years. Health guidelines from independent scientists are often stricter. Results vary by home, plumbing and date.

Fix it, honestly.

Dissolved metals · nitrate

Reverse osmosis

NSF-58 certified under-sink RO — the only tech that broadly removes dissolved contaminants at the tap.

Chlorine · taste · odor

Catalytic carbon

NSF-42 whole-house carbon cuts chlorine, chloramine and the pool-water taste.

First step

Filter bottle

Certified grab-and-go protection while you decide on the whole-home fix.