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Tap water quality report

Downingtown Water Authority

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
9,900
people served
26
health-based violations
Pennsylvania rankingsLead in PennsylvaniaPFAS in Pennsylvania
Water source
Surface water
Ownership
Local government
Counties served
Chester

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.

26
health-based violations
249
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2014-04-01 → 2014-06-30
TT Health-based Resolved 2014-04-01 → 2014-06-30
TT Health-based Resolved 2014-04-01 → 2014-06-30
MCL Health-based Resolved 2013-04-01 → 2013-06-30
MCL Health-based Resolved 2013-04-01 → 2013-06-30
MCL Health-based Resolved 2013-04-01 → 2013-06-30
MCL Health-based Resolved 2013-04-01 → 2013-06-30
TT Health-based Resolved 2005-10-01 → 2005-12-31
TT Health-based Resolved 2005-07-01 → 2005-09-30
TT Health-based Resolved 2005-07-01 → 2005-09-30

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
PFBS 0.0038 µg/L 3/4 2024
Pfhxa 0.0031 µg/L 1/4 2024
PFOA 0.0042 µg/L 1/4 2024
Pfpea 0.0034 µg/L 1/4 2024

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 single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Bromodichloromethane
15 µg/L
No EPA limit set
 57/57 SYR4 2012–2019
Chloroform
56 µg/L
No EPA limit set
 57/57 SYR4 2012–2019
Dibromochloromethane
6.6 µg/L
No EPA limit set
 57/57 SYR4 2012–2019
TTHM
73.6 µg/L 92%
of the EPA limit 80 µg/L
 57/57 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
94.9 µg/L 158%
of the EPA limit, in the worst sample — 60 µg/L
 57/57 SYR4 2012–2019
Copper
364 µg/L 28%
of the EPA limit 1300 µg/L
 55/66 SYR4 2013–2019
Dichloroacetic Acid
32 µg/L
No EPA limit set
 24/24 SYR4 2017–2019
Trichloroacetic Acid
25 µg/L
No EPA limit set
 24/24 SYR4 2017–2019
Nitrate
5530 µg/L 55%
of the EPA limit 10000 µg/L
 22/22 SYR4 2012–2019
Dibromoacetic Acid
2 µg/L
No EPA limit set
 18/24 SYR4 2017–2019
Lead
0.0020 mg/L 13%
of the EPA limit 0.0150 mg/L
 17/17 LCR 2025
Bromoform
1.2 µg/L
No EPA limit set
 13/57 SYR4 2012–2019
Lead
69 µg/L 460%
of the EPA limit, in the worst sample — 15 µg/L
 6/65 SYR4 2013–2019
Barium
47 µg/L 2.4%
of the EPA limit 2000 µg/L
 4/7 SYR4 2013–2019
Fluoride
1060 µg/L 27%
of the EPA limit 4000 µg/L
 2/7 SYR4 2013–2019
Combined Uranium
0.4500 µg/L 1.5%
of the EPA limit 30 µg/L
 1/2 SYR4 2014–2019
Dichloromethane
0.8000 µg/L 16%
of the EPA limit 5 µg/L
 1/8 SYR4 2012–2019
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-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPfdaPfdoaPfeesaPfhpaPfhpsPFHXSPfmbaPfmpaPFNAPFOSPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
STEPHEN SULLINS
Phone
610-269-5362

Frequently asked questions about Downingtown Water Authority

Is Downingtown Water Authority tap water safe to drink?

EPA monitoring detected 21 contaminants in Downingtown Water Authority'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 Downingtown Water Authority's water?

EPA monitoring detected Bromodichloromethane, Chloroform, Dibromochloromethane, TTHM, Total Haloacetic Acids (HAA5), and others. The full list with the level and data source for each is above.

How many people does Downingtown Water Authority serve?

Downingtown Water Authority reports serving 9,900 people in Pennsylvania, per its EPA record.

Has Downingtown Water Authority had any water quality violations?

The EPA has 249 violations on file for Downingtown Water Authority, of which 26 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.