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PublicWater Watch

City of Frederick

Published drinking-water records and contacts for City of Frederick. System MD0100015. Review sources and dates; not a real-time water assessment.

System ID
MD0100015
State or territory
MD
Published population served
54000
System type (source code)
CWS

Published records and dates

Missing records here do not mean the provider did not test. Published records are not a real-time assessment of your tap water.

Read the provider’s annual water quality report

Report link listed: 2026-10-09. This is not the report’s sampling date.

Published testing results

Selected recent records are shown below. Different sampling locations and dates are not interchangeable. These excerpts are not a complete testing history.

“<” means below the stated reporting limit, not zero. A reported measurement alone is not a safety verdict. Read an example

EPA UCMR 5 — most recent imported sample per substance
SubstancePublished resultReporting limitSample dateSampling location
11Cl-PF3OUdS< 0.005 µg/L0.005 µg/L2024-12-10Fredercik County Intertie / EP001
4:2 FTS< 0.003 µg/L0.003 µg/L2024-12-10Lester R. Dingle Filter Plant / 0300000
6:2 FTS< 0.005 µg/L0.005 µg/L2024-12-10Fredercik County Intertie / EP001
8:2 FTS< 0.005 µg/L0.005 µg/L2024-12-10Monocacy River Filter Plant / 0100000
9Cl-PF3ONS< 0.002 µg/L0.002 µg/L2024-12-10Lester R. Dingle Filter Plant / 0300000
ADONA< 0.003 µg/L0.003 µg/L2024-12-10Lester R. Dingle Filter Plant / 0300000
HFPO-DA< 0.005 µg/L0.005 µg/L2024-12-10Lester R. Dingle Filter Plant / 0300000
NEtFOSAA< 0.005 µg/L0.005 µg/L2024-12-10Monocacy River Filter Plant / 0100000
NFDHA< 0.02 µg/L0.02 µg/L2024-12-10Lester R. Dingle Filter Plant / 0300000
NMeFOSAA< 0.006 µg/L0.006 µg/L2024-12-10Linganore Creek Filter Plant / 0200000
PFBA< 0.005 µg/L0.005 µg/L2024-12-10Lester R. Dingle Filter Plant / 0300000
PFBS< 0.003 µg/L0.003 µg/L2024-12-10Monocacy River Filter Plant / 0100000
PFDA< 0.003 µg/L0.003 µg/L2024-12-10Fredercik County Intertie / EP001
PFDoA< 0.003 µg/L0.003 µg/L2024-12-10Monocacy River Filter Plant / 0100000
PFEESA< 0.003 µg/L0.003 µg/L2024-12-10Monocacy River Filter Plant / 0100000
PFHpA< 0.003 µg/L0.003 µg/L2024-12-10Monocacy River Filter Plant / 0100000
PFHpS< 0.003 µg/L0.003 µg/L2024-12-10Lester R. Dingle Filter Plant / 0300000
PFHxA< 0.003 µg/L0.003 µg/L2024-12-10Lester R. Dingle Filter Plant / 0300000
PFHxS< 0.003 µg/L0.003 µg/L2024-12-10Lester R. Dingle Filter Plant / 0300000
PFMBA< 0.003 µg/L0.003 µg/L2024-12-10Lester R. Dingle Filter Plant / 0300000
PFMPA< 0.004 µg/L0.004 µg/L2024-12-10Linganore Creek Filter Plant / 0200000
PFNA< 0.004 µg/L0.004 µg/L2024-12-10Linganore Creek Filter Plant / 0200000
PFOA< 0.004 µg/L0.004 µg/L2024-12-10Lester R. Dingle Filter Plant / 0300000
PFOS< 0.004 µg/L0.004 µg/L2024-12-10Monocacy River Filter Plant / 0100000
PFPeA< 0.003 µg/L0.003 µg/L2024-12-10Lester R. Dingle Filter Plant / 0300000
PFPeS< 0.004 µg/L0.004 µg/L2024-12-10Fredercik County Intertie / EP001
PFTA< 0.008 µg/L0.008 µg/L2024-12-10Fredercik County Intertie / EP001
PFTrDA< 0.007 µg/L0.007 µg/L2024-12-10Linganore Creek Filter Plant / 0200000
PFUnA< 0.002 µg/L0.002 µg/L2024-12-10Linganore Creek Filter Plant / 0200000
lithium< 9 µg/L9 µg/L2024-12-10Lester R. Dingle Filter Plant / 0300000

Download all EPA UCMR 5 records (CSV)

Lead and copper: 90th-percentile summaries

These describe a monitoring period across sampled locations, not the result at your home. How to read the 90th percentile

Eight most recent imported monitoring summaries
SubstancePublished 90th percentileMonitoring periodSource quarter
Lead (PB90) 0.0011 mg/L2019-01-01 – 2021-12-312026Q3
Lead (PB90) 0 mg/L2016-01-01 – 2018-12-312026Q3
Lead (PB90) 0.00121 mg/L2013-01-01 – 2015-12-312026Q3
Lead (PB90) 0.002 mg/L2010-01-01 – 2012-12-312026Q3
Lead (PB90) 0.001 mg/L2007-01-01 – 2009-12-312026Q3
Lead (PB90) 0.002 mg/L2006-07-01 – 2006-12-312026Q3
Lead (PB90) 0.002 mg/L2006-01-01 – 2006-06-302026Q3
Lead (PB90) 0.004 mg/L2000-01-01 – 2002-12-312026Q3
Twelve most recent imported state laboratory records
SubstancePublished resultSample dateLocation / source
11Cl-PF3OUdSBelow a limit; numeric threshold unavailable ppt2022-08-10MONOCACY FILTER PLANT / Maryland MDE PFAS study — Phase 4
9Cl-PF3ONSBelow a limit; numeric threshold unavailable ppt2022-08-10MONOCACY FILTER PLANT / Maryland MDE PFAS study — Phase 4
ADONABelow a limit; numeric threshold unavailable ppt2022-08-10MONOCACY FILTER PLANT / Maryland MDE PFAS study — Phase 4
HFPO-DABelow a limit; numeric threshold unavailable ppt2022-08-10MONOCACY FILTER PLANT / Maryland MDE PFAS study — Phase 4
N-EtFOSAABelow a limit; numeric threshold unavailable ppt2022-08-10MONOCACY FILTER PLANT / Maryland MDE PFAS study — Phase 4
N-MeFOSAABelow a limit; numeric threshold unavailable ppt2022-08-10MONOCACY FILTER PLANT / Maryland MDE PFAS study — Phase 4
PFBS4.54 ppt2022-08-10MONOCACY FILTER PLANT / Maryland MDE PFAS study — Phase 4
PFDABelow a limit; numeric threshold unavailable ppt2022-08-10MONOCACY FILTER PLANT / Maryland MDE PFAS study — Phase 4
PFDoABelow a limit; numeric threshold unavailable ppt2022-08-10MONOCACY FILTER PLANT / Maryland MDE PFAS study — Phase 4
PFHpA1.28 ppt2022-08-10MONOCACY FILTER PLANT / Maryland MDE PFAS study — Phase 4
PFHxA2.58 ppt2022-08-10MONOCACY FILTER PLANT / Maryland MDE PFAS study — Phase 4
PFHxS1.18 ppt2022-08-10MONOCACY FILTER PLANT / Maryland MDE PFAS study — Phase 4

State sampling points can include untreated water. Publisher qualifiers and units are retained; consult the full source notes before interpreting a record.

Download state records with source notes (CSV)

Published compliance history

0 imported records. Status is as recorded in the source; historical records are not current advisories. Missing records do not establish that no violations occurred.

Source dates and refresh checks

A refresh check is not a sample date. Publication periods, sample dates and checks are shown separately.

Administrative contact (EPA filing)

Rosenberg, Robert: 301-600-1754

An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.

Official state resources · How to read these records