WaterCheck Ireland

Navan Tap Water Quality

EPA monitoring records for Water Supply Zones mapped to Navan contain 1,062 monitoring results across 68 parameters in 2025.

The separate EPA exceedance dataset contains 6 listed exceedance records across 5 parameters.

The most frequently listed were Trihalomethanes(Total) (2), Coliform Bacteria (1) and Colony Count @ 22°C (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 Zones
2
1,062Monitoring results
68Parameters tested
6EPA-listed exceedances
54Samples

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

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 ug/l
2025 maximum2 ug/l
Measurements in 20256

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.

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Numeric resultEPA-listed exceedance

10 numeric measurements available; 23 text-only records retained in JSON.

Nitrate

2025 median8.52
2025 maximum11.54
Measurements in 20256

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.

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Numeric resultEPA-listed exceedance

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

E. coli

2025 median0
2025 maximum0
Measurements in 202554

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.

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Numeric resultEPA-listed exceedance

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

Coliform Bacteria

2025 median0 100ml
2025 maximum2 100ml
Measurements in 202554

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

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

Fluoride

2025 median0.6
2025 maximum0.8
Measurements in 20256

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.

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Numeric resultEPA-listed exceedance

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

Iron

2025 median19 ug/l
2025 maximum22 ug/l
Measurements in 202554

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

32 numeric measurements available; 253 text-only records retained in JSON.

Arsenic

2025 median—
2025 maximum—
Measurements in 20256

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; 33 text-only records retained in JSON.

20251,062 results · 6 listed exceedances
Total results — independent scale
0 577.5 1,155 1,042 2021 1,155 2022 1,068 2023 1,106 2024 1,062 2025
Listed exceedances per 1,000 results — independent scale
0.000 2.825 5.650 3.839 2021 3.463 2022 5.618 2023 2.712 2024 5.650 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
20211,042586443.839
20221,155636443.463
20231,068556565.618
20241,106556532.712
20251,062546865.650

Year-to-year detail

2025 compared with 2024

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

Results
20241,106
20251,062
-44
Listed exceedances
20243
20256
+3
Samples
202455
202554
-1
Parameters
202465
202568
+3

Parameters with EPA-listed exceedances

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

Trihalomethanes(Total)

2 listed exceedance records / 6 tests33.33%

Descriptive frequency of records, not an official compliance measure.

Highest listed result
115.7 ug/l
Reported limit
100 ug/l
Records with this unit/limit pair
2
Latest exceedance
02 Oct 2025

Coliform Bacteria

1 listed exceedance records / 54 tests1.85%

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
22 May 2025

Colony Count @ 22°C

1 listed exceedance records / 48 tests2.08%

Descriptive frequency of records, not an official compliance measure.

Highest listed result
164 1ml
Reported limit
100 1ml
Records with this unit/limit pair
1
Latest exceedance
22 May 2025

Colour

1 listed exceedance records / 54 tests1.85%

Descriptive frequency of records, not an official compliance measure.

Highest listed result
30 Hazen
Reported limit
20 Hazen
Records with this unit/limit pair
1
Latest exceedance
17 Jul 2025

MCPA

1 listed exceedance records / 6 tests16.67%

Descriptive frequency of records, not an official compliance measure.

Highest listed result
0.124 µg/l
Reported limit
0.1 µg/l
Records with this unit/limit pair
1
Latest exceedance
06 May 2025

Across the year

When were listed exceedances recorded?

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

Trihalomethanes(Total)02 Oct 2025
103.5 ug/lReported result
100 ug/lReported limit
Navan-Mid Meath Kilcarn PWSWater supply
JanFebMarAprMayJunJulAugSepOctNovDecColiform BacteriaColony Count @ 22°CColourMCPATrihalomethanes(Total)02 Oct 2025 — Trihalomethanes(Total): 103.5 ug/l; reported limit 100; Navan-Mid Meath Kilcarn PWS; sample 0492/2510355/0217 Jul 2025 — Colour: 30 Hazen; reported limit 20; Navan Mid-Meath Liscarton PWS; sample 0492/2507261/0306 Jun 2025 — Trihalomethanes(Total): 115.7 ug/l; reported limit 100; Navan-Mid Meath Kilcarn PWS; sample 0492/2506226/0122 May 2025 — Coliform Bacteria: 2 100ml; reported limit 0; Navan-Mid Meath Kilcarn PWS; sample 0492/2505214/0322 May 2025 — Colony Count @ 22°C: 164 1ml; reported limit 100; Navan-Mid Meath Kilcarn PWS; sample 0492/2505214/0306 May 2025 — MCPA: 0.124 µg/l; reported limit 0.1; Navan Mid-Meath Liscarton PWS; sample 0492/2505203/01

6 listed exceedance records across 5 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.

Navan-Mid Meath Liscarton PWS

78.12% geographic overlap with the Navan Built Up Area.

Technical mapping details
EDEN code
2300PUB1016
Local authority
Meath
Page totals
Included
Spatial rank
1
Historical EPA scheme
Available
Latest monitoring year
2025
Navan-Mid Meath Kilcarn PWS

19.73% geographic overlap with the Navan Built Up Area.

Technical mapping details
EDEN code
2300PUB1051
Local authority
Meath
Page totals
Included
Spatial rank
2
Historical EPA scheme
Available
Latest monitoring year
2025

Detailed data

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

68 parameter rows6 listed exceedance records54 samples
Show detailed data68 parameters · 6 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-dichloroethane6003 Nov 20252
2,3,6-trichlorobenzoic acid6003 Nov 20252
2,4-D6003 Nov 20252
Acrylamide6003 Nov 20252
Aluminium54004 Dec 20252
Ammonium6003 Nov 20252
Antimony6003 Nov 20252
Arsenic6003 Nov 20252
Atrazine6003 Nov 20252
Bentazone6003 Nov 20252
Benzene6003 Nov 20252
Benzo(a)pyrene6003 Nov 20252
Bisphenol A6003 Nov 20252
Boron6003 Nov 20252
Bromate6003 Nov 20252
Cadmium6003 Nov 20252
Chlorfenvinphos6003 Nov 20252
Chloride6003 Nov 20252
Chromium6003 Nov 20252
Clopyralid6003 Nov 20252
Clostridium Perfringens6003 Nov 20252
Coliform Bacteria54104 Dec 20252
Colony Count @ 22°C48104 Dec 20252
Colour54104 Dec 20252
Conductivity54004 Dec 20252
Copper6003 Nov 20252
Cyanide6003 Nov 20252
Cypermethrin6003 Nov 20252
Dichlobenil6003 Nov 20252
Dichlorprop6003 Nov 20252
Diflufenican6003 Nov 20252
Diuron6003 Nov 20252
E. coli54004 Dec 20252
Enterococci54004 Dec 20252
Fluoride6003 Nov 20252
Free Chlorine54004 Dec 20252
Glyphosate6003 Nov 20252
Haloacetic acids (Sum of 5 HAAs)6003 Nov 20252
Iron54004 Dec 20252
Isoproturon6003 Nov 20252
Lead6003 Nov 20252
Linuron6003 Nov 20252
Manganese6003 Nov 20252
MCPA6103 Nov 20252
Mecoprop6003 Nov 20252
Mercury6003 Nov 20252
Metaldehyde6003 Nov 20252
Nickel6003 Nov 20252
Nitrate6003 Nov 20252
Nitrite (at tap)6003 Nov 20252
Odour48004 Dec 20252
PAH6003 Nov 20252
Pendimethalin6003 Nov 20252
Pesticides - Total6003 Nov 20252
pH54004 Dec 20252
Propyzamide6003 Nov 20252
Selenium6003 Nov 20252
Simazine6003 Nov 20252
Sodium6003 Nov 20252
Sulphate6003 Nov 20252
Sum of PFAS (sum of 20)6003 Nov 20252
Taste48004 Dec 20252
Tetrachloroethene & Trichloroethene6003 Nov 20252
Total Chlorine54004 Dec 20252
Total Organic Carbon6003 Nov 20252
Triclopyr6003 Nov 20252
Trihalomethanes(Total)6203 Nov 20252
Turbidity (at tap)54004 Dec 20252

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
02 Oct 2025Trihalomethanes(Total)103.5ug/l100Navan-Mid Meath Kilcarn PWS
2300PUB1051		0492/2510355/02
17 Jul 2025Colour30Hazen20Navan Mid-Meath Liscarton PWS
2300PUB1016		0492/2507261/03
06 Jun 2025Trihalomethanes(Total)115.7ug/l100Navan-Mid Meath Kilcarn PWS
2300PUB1051		0492/2506226/01
22 May 2025Coliform Bacteria2100ml0Navan-Mid Meath Kilcarn PWS
2300PUB1051		0492/2505214/03
22 May 2025Colony Count @ 22°C1641ml100Navan-Mid Meath Kilcarn PWS
2300PUB1051		0492/2505214/03
06 May 2025MCPA0.124µg/l0.1Navan Mid-Meath Liscarton PWS
2300PUB1016		0492/2505203/01

Common questions

Frequently asked questions

Is Navan 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 Navan?

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 Navan?

In 2025, monitoring data for 2 Water Supply Zones mapped to Navan included 1,062 results across 68 parameters. The separate EPA-listed exceedance dataset contains 6 records for those zones in 2025. These figures summarise historical records and are not a current safety verdict.

Who monitors drinking water quality in Navan?

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 Navan

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

TrimMeath · approximately 12.6 kmKellsMeath · approximately 15.6 kmDunshaughlinMeath · approximately 17.9 kmRatoathMeath · approximately 21.6 kmDroghedaLouth · approximately 23.1 kmAshbourneMeath · approximately 24.1 km

How this page is made

Sources and methodology

Settlement
Census 2022 Built Up Area: Navan. 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