WaterCheck Ireland

Monaghan Tap Water Quality

EPA monitoring records for Water Supply Zones mapped to Monaghan contain 325 monitoring results across 68 parameters in 2025.

The separate EPA exceedance dataset contains 1 listed exceedance records across 1 parameter.

The most frequently listed parameter was Coliform Bacteria (1).

These are historical monitoring records and do not confirm the current status of water at a specific address. Current notices are maintained by Uisce Éireann.

Latest monitoring year
2025
Page updated
September 2026
Water Supply Zone
Monaghan
Geographic overlap
76.11%
325Monitoring results
68Parameters tested
1EPA-listed exceedances
16Samples

The Monaghan Built Up Area overlaps Monaghan across approximately 76.11% of its land area.

Monitoring results apply to the Water Supply Zone as a whole and may include sampling locations outside Monaghan.

Selected monitoring data

Key drinking water parameters

Parameters are shown when measurements are available. Text-only and censored values remain unchanged in the detailed history.

Lead

2025 median1
2025 maximum1
Measurements in 20252

0 EPA-listed exceedances in 2025.

View parameter history

Individual numeric measurements from 2021–2025. Text-only and censored results are retained in the history JSON and are not plotted as numbers.

Open this chart to load the measurements.

Numeric resultEPA-listed exceedance

3 numeric measurements available; 8 text-only records retained in JSON.

Nitrate

2025 median—
2025 maximum—
Measurements in 20252

0 EPA-listed exceedances in 2025.

View parameter history

Individual numeric measurements from 2021–2025. Text-only and censored results are retained in the history JSON and are not plotted as numbers.

Open this chart to load the measurements.

Numeric resultEPA-listed exceedance

1 numeric measurements available; 10 text-only records retained in JSON.

E. coli

2025 median0
2025 maximum0
Measurements in 202516

0 EPA-listed exceedances in 2025.

View parameter history

Individual numeric measurements from 2021–2025. Text-only and censored results are retained in the history JSON and are not plotted as numbers.

Open this chart to load the measurements.

Numeric resultEPA-listed exceedance

80 numeric measurements available; 0 text-only records retained in JSON.

Coliform Bacteria

2025 median0 100ml
2025 maximum2 100ml
Measurements in 202516

1 EPA-listed exceedances in 2025.

View parameter history

Individual numeric measurements from 2021–2025. Text-only and censored results are retained in the history JSON and are not plotted as numbers.

Open this chart to load the measurements.

Numeric resultEPA-listed exceedance

80 numeric measurements available; 0 text-only records retained in JSON.

Fluoride

2025 median0.65 mg/l
2025 maximum0.7 mg/l
Measurements in 20252

0 EPA-listed exceedances in 2025.

View parameter history

Individual numeric measurements from 2021–2025. Text-only and censored results are retained in the history JSON and are not plotted as numbers.

Open this chart to load the measurements.

Numeric resultEPA-listed exceedance

11 numeric measurements available; 0 text-only records retained in JSON.

Iron

2025 median12
2025 maximum20
Measurements in 202516

0 EPA-listed exceedances in 2025.

View parameter history

Individual numeric measurements from 2021–2025. Text-only and censored results are retained in the history JSON and are not plotted as numbers.

Open this chart to load the measurements.

Numeric resultEPA-listed exceedance

45 numeric measurements available; 35 text-only records retained in JSON.

Arsenic

2025 median—
2025 maximum—
Measurements in 20252

0 EPA-listed exceedances in 2025.

View parameter history

Individual numeric measurements from 2021–2025. Text-only and censored results are retained in the history JSON and are not plotted as numbers.

Open this chart to load the measurements.

Numeric resultEPA-listed exceedance

0 numeric measurements available; 11 text-only records retained in JSON.

2025325 results · 1 listed exceedances
Total results — independent scale
0 196.5 393 291 2021 304 2022 393 2023 304 2024 325 2025
Listed exceedances per 1,000 results — independent scale
0.000 1.718 3.436 3.436 2021 0.000 2022 0.000 2023 3.289 2024 3.077 2025

This is our descriptive frequency: listed exceedance records divided by result records, multiplied by 1,000. It is not an official EPA compliance rate. Differences in sampling volume and parameters tested affect comparisons. A missing denominator is shown as unavailable.

Monitoring history by year
YearResultsSamplesParametersListed exceedancesPer 1,000 results
2021291156413.436
2022304166400.000
2023393186400.000
2024304156413.289
2025325166813.077

Year-to-year detail

2025 compared with 2024

Changes describe dataset volumes only. The comparison uses the previous available year.

Results
2024304
2025325
+21
Listed exceedances
20241
20251
0
Samples
202415
202516
+1
Parameters
202464
202568
+4

Parameters with EPA-listed exceedances

Values and limits are reproduced as reported. Different unit/limit pairs are shown separately.

Coliform Bacteria

1 listed exceedance records / 16 tests6.25%

Descriptive frequency of records, not an official compliance measure.

Highest listed result
2 100ml
Reported limit
0 100ml
Records with this unit/limit pair
1
Latest exceedance
21 Jul 2025

Across the year

When were listed exceedances recorded?

Each point represents one listed exceedance record. Records on the same date remain separate.

Coliform Bacteria21 Jul 2025
2 100mlReported result
0 100mlReported limit
MonaghanWater supply
JanFebMarAprMayJunJulAugSepOctNovDecColiform Bacteria21 Jul 2025 — Coliform Bacteria: 2 100ml; reported limit 0; Monaghan; sample 188342

1 listed exceedance records across 1 parameters in 2025.

Your mapped supply

Water supply

Every Water Supply Zone used for this page's headline figures is included. Geographic overlaps are reported separately and are not added together or weighted by population.

Monaghan

76.11% geographic overlap with the Monaghan Built Up Area.

Technical mapping details
EDEN code
2400PUB1024
Local authority
Monaghan
Page totals
Included
Spatial rank
1
Historical EPA scheme
Available
Latest monitoring year
2025

Detailed data

The complete parameter and listed exceedance tables for the reporting year.

68 parameter rows1 listed exceedance records16 samples
Show detailed data68 parameters · 1 exceedance records

Complete parameter index

All parameters in 2025

All parameters with test results or listed exceedance records in the latest reporting year
1,2-dichloroethane2005 Aug 20251
2,3,6-trichlorobenzoic acid2005 Aug 20251
2,4-D2005 Aug 20251
Aluminium15010 Dec 20251
Ammonium2005 Aug 20251
Antimony2005 Aug 20251
Arsenic2005 Aug 20251
Atrazine2005 Aug 20251
Bentazone2005 Aug 20251
Benzene2005 Aug 20251
Benzo(a)pyrene2005 Aug 20251
Bisphenol A2005 Aug 20251
Boron2005 Aug 20251
Bromate2005 Aug 20251
Cadmium2005 Aug 20251
Chlorfenvinphos2005 Aug 20251
Chloride2005 Aug 20251
Chromium2005 Aug 20251
Clopyralid2005 Aug 20251
Clostridium Perfringens2005 Aug 20251
Coliform Bacteria16110 Dec 20251
Colony Count @ 22°C14010 Dec 20251
Colour16010 Dec 20251
Conductivity16010 Dec 20251
Copper2005 Aug 20251
Cyanide2005 Aug 20251
Cypermethrin2005 Aug 20251
Dichlobenil2005 Aug 20251
Dichlorprop2005 Aug 20251
Diflufenican2005 Aug 20251
Diuron2005 Aug 20251
E. coli16010 Dec 20251
Enterococci16010 Dec 20251
Fluoride2005 Aug 20251
Free Chlorine16010 Dec 20251
Glyphosate2005 Aug 20251
Haloacetic acids (Sum of 5 HAAs)2005 Aug 20251
Iron16010 Dec 20251
Isoproturon2005 Aug 20251
Lead2005 Aug 20251
Linuron2005 Aug 20251
Manganese2005 Aug 20251
MCPA2005 Aug 20251
Mecoprop2005 Aug 20251
Mercury2005 Aug 20251
Metaldehyde2005 Aug 20251
Microcystin-LR2005 Aug 20251
Nickel2005 Aug 20251
Nitrate2005 Aug 20251
Nitrite (at tap)2005 Aug 20251
Odour14010 Dec 20251
PAH2005 Aug 20251
Pendimethalin2005 Aug 20251
Pesticides - Total2005 Aug 20251
pH16010 Dec 20251
Propyzamide2005 Aug 20251
Selenium2005 Aug 20251
Simazine2005 Aug 20251
Sodium2005 Aug 20251
Sulphate2005 Aug 20251
Sum of PFAS (sum of 20)2005 Aug 20251
Taste14010 Dec 20251
Tetrachloroethene & Trichloroethene2005 Aug 20251
Total Chlorine16010 Dec 20251
Total Organic Carbon2005 Aug 20251
Triclopyr2005 Aug 20251
Trihalomethanes(Total)2005 Aug 20251
Turbidity (at tap)16010 Dec 20251

Showing 68 of 68 parameters.

EPA exceedance dataset

Listed exceedances in 2025

Newest first. Sample IDs distinguish records that may otherwise look identical.

All listed exceedance records in the latest reporting year
DateParameterResultUnitReported limitWater supply / EDENSample ID
21 Jul 2025Coliform Bacteria2100ml0Monaghan
2400PUB1024		188342

Common questions

Frequently asked questions

Is Monaghan tap water safe to drink?

WaterCheck Ireland does not issue a current safe or unsafe verdict. This page presents historical monitoring data. Check Uisce Éireann for any current Boil Water or Do Not Consume notices affecting your address.

Can you drink tap water in Monaghan?

WaterCheck Ireland provides historical drinking-water monitoring data, not a current safe or unsafe verdict. For current Boil Water or Do Not Consume notices, check your Eircode with Uisce Éireann.

What is the tap water quality in Monaghan?

In 2025, monitoring data for the Water Supply Zone mapped to Monaghan included 325 results across 68 parameters. The separate EPA-listed exceedance dataset contains 1 records for those zones in 2025. These figures summarise historical records and are not a current safety verdict.

Who monitors drinking water quality in Monaghan?

The historical monitoring figures shown here come from drinking-water datasets published by the Environmental Protection Agency (EPA), Ireland. Uisce Éireann operates public water supplies and publishes current supply notices.

What is a Water Supply Zone?

A Water Supply Zone is a defined area supplied by a public drinking-water system. Monitoring records apply to the zone as a whole, so sampling locations can be outside the Census Built Up Area.

What does a listed exceedance mean?

It is a record published in the separate EPA exceedance dataset. WaterCheck Ireland reproduces those records and does not infer additional exceedances or turn the record count into a safety assessment.

How can I check current water notices for my Eircode?

Use your Eircode on the Uisce Éireann website to check current Boil Water and Do Not Consume notices. This page is based on historical monitoring data and is not a live notice service.

Explore nearby reports

Water Quality Near Monaghan

Nearest published Built Up Areas, ordered by straight-line distance between Census reference points.

CarrickmacrossMonaghan · approximately 34.2 kmCavanCavan · approximately 37.6 kmDundalkLouth · approximately 46.6 kmArdeeLouth · approximately 51.5 kmKellsMeath · approximately 58.0 kmNavanMeath · approximately 68.8 km

How this page is made

Sources and methodology

Settlement
Census 2022 Built Up Area: Monaghan. Population refers to the whole Built Up Area.
Supply mapping
Uisce Éireann Water Supply Zone boundaries are matched geographically to the settlement.
Monitoring
EPA monitoring results and the separate listed exceedance dataset, 2021–2025.
Interpretation
Geographic overlap measures land area, not population served; monitoring applies across the full supply zone.

Read the full methodologyView data sources