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Tap water quality report

Caernarvon Twp Auth

EPA monitoring tested this supplier for 110 contaminants and detected 21. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

110
contaminants tested
21
detected
4,245
people served
14
health-based violations
Pennsylvania rankingsLead in PennsylvaniaPFAS in Pennsylvania
Water source
Ground water
Ownership
Local government
Counties served
Berks

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

14
health-based violations
521
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2015-10-01 → 2015-10-31
TT Health-based Resolved 2015-10-01 → 2015-10-31
TT Health-based Resolved 2015-10-01 → 2015-10-31
TT Health-based Resolved 2015-10-01 → 2015-10-31
MCL Health-based Resolved 2015-08-01 → 2015-08-31
MCL Health-based Resolved 2015-08-01 → 2015-08-31
MCL Health-based Resolved 2015-08-01 → 2015-08-31
MCL Health-based Resolved 2015-08-01 → 2015-08-31
MCL Health-based Resolved 1999-10-01 → 2000-09-30
MCL Health-based Resolved 1999-10-01 → 2000-09-30

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
Pfhxa 0.0920 µg/L 3/6 2025
Pfpea 0.0754 µg/L 3/6 2025
Pfba 0.0562 µg/L 2/6 2025
PFBS 0.0290 µg/L 2/6 2025
Pfhpa 0.0231 µg/L 2/6 2025
PFOA 0.0558 µg/L 2/6 2025

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Nitrate
8380 µg/L 84%
of the EPA limit 10000 µg/L
worst single sample: 8920 µg/L
88/92 SYR4 2012–2019
Copper
522.75 µg/L 40%
of the EPA limit 1300 µg/L
worst single sample: 629 µg/L
54/60 SYR4 2013–2019
Bromodichloromethane
7.8 µg/L
No EPA limit set
worst single sample: 8.3 µg/L
11/11 SYR4 2013–2019
Chloroform
10.25 µg/L
No EPA limit set
worst single sample: 10.4 µg/L
11/11 SYR4 2013–2019
Dibromochloromethane
4.9 µg/L
No EPA limit set
worst single sample: 5 µg/L
11/11 SYR4 2013–2019
TTHM
23.7 µg/L 30%
of the EPA limit 80 µg/L
worst single sample: 24.5 µg/L
9/9 SYR4 2013–2019
Total Haloacetic Acids (HAA5)
3.592 µg/L 6%
of the EPA limit 60 µg/L
worst single sample: 4 µg/L
9/9 SYR4 2013–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 7/7 LCR 2025
Bromoform
1.375 µg/L
No EPA limit set
worst single sample: 1.4 µg/L
6/10 SYR4 2013–2019
Lead
74.8 µg/L 499%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 89 µg/L
5/60 SYR4 2013–2019
Combined Uranium
12.0452 µg/L 40%
of the EPA limit 30 µg/L
worst single sample: 12.1882 µg/L
4/18 SYR4 2012–2018
Thallium, Total
1.9 µg/L 95%
of the EPA limit 2 µg/L
worst single sample: 2 µg/L
3/9 SYR4 2012–2018
Dichloroacetic Acid
2.95 µg/L
No EPA limit set
worst single sample: 3 µg/L
2/3 SYR4 2017–2019
Mercury
0.8750 µg/L 44%
of the EPA limit 2 µg/L
worst single sample: 0.9000 µg/L
2/9 SYR4 2012–2018
Dibromoacetic Acid
1 µg/L
No EPA limit set
 1/3 SYR4 2017–2019
89 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalArsenicAsbestosAtrazineBhc-GammaBariumBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneFluorideGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfdaPfdoaPfeesaPfhpsPFHXSPfmbaPfmpaPFNAPFOSPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
PAUL MCEWEN
Phone
610-286-1017

Frequently asked questions about Caernarvon Twp Auth

Is Caernarvon Twp Auth tap water safe to drink?

EPA monitoring detected 21 contaminants in Caernarvon Twp Auth's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Caernarvon Twp Auth's water?

EPA monitoring detected Nitrate, Copper, Bromodichloromethane, Chloroform, Dibromochloromethane, and others. The full list with the level and data source for each is above.

How many people does Caernarvon Twp Auth serve?

Caernarvon Twp Auth reports serving 4,245 people in Pennsylvania, per its EPA record.

Has Caernarvon Twp Auth had any water quality violations?

The EPA has 521 violations on file for Caernarvon Twp Auth, of which 14 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.