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Tap water quality report

Northwestern Lancaster Co Auth

EPA monitoring tested this supplier for 80 contaminants and detected 16. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

80
contaminants tested
16
detected
2,968
people served
35
health-based violations
Pennsylvania rankingsLead in PennsylvaniaPFAS in Pennsylvania
Water source
SWP
Ownership
Local government
Counties served
Lancaster

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.

35
health-based violations
165
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2011-04-01 → 2011-06-30
MCL Health-based Resolved 2011-04-01 → 2011-06-30
MCL Health-based Resolved 2011-04-01 → 2011-06-30
MCL Health-based Resolved 2011-04-01 → 2011-06-30
MCL Health-based Resolved 2011-01-01 → 2011-03-31
MCL Health-based Resolved 2011-01-01 → 2011-03-31
MCL Health-based Resolved 2011-01-01 → 2011-03-31
MCL Health-based Resolved 2011-01-01 → 2011-03-31
MCL Health-based Resolved 2011-01-01 → 2011-03-31
MCL Health-based Resolved 2011-01-01 → 2011-03-31

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
10200 µg/L 102%
of the EPA limit, at the 95th percentile of samples — 10000 µg/L
worst single sample: 11000 µg/L
84/84 SYR4 2012–2019
Bromodichloromethane
23.01 µg/L
No EPA limit set
worst single sample: 33.5 µg/L
67/67 SYR4 2012–2019
Chloroform
90.68 µg/L
No EPA limit set
worst single sample: 101 µg/L
67/67 SYR4 2012–2019
TTHM
115 µg/L 144%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
worst single sample: 129 µg/L
67/67 SYR4 2012–2019
Dibromochloromethane
7.35 µg/L
No EPA limit set
worst single sample: 13.7 µg/L
66/67 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
40.26 µg/L 67%
of the EPA limit 60 µg/L
worst single sample: 58.3 µg/L
65/65 SYR4 2012–2019
Copper
850 µg/L 65%
of the EPA limit 1300 µg/L
worst single sample: 936 µg/L
53/55 SYR4 2012–2019
Lead
17.8 µg/L 119%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 390 µg/L
33/54 SYR4 2012–2019
Bromoform
1.59 µg/L
No EPA limit set
worst single sample: 2.5 µg/L
22/67 SYR4 2012–2019
Dichloroacetic Acid
17 µg/L
No EPA limit set
worst single sample: 20 µg/L
22/22 SYR4 2017–2019
Trichloroacetic Acid
29.75 µg/L
No EPA limit set
worst single sample: 41 µg/L
22/22 SYR4 2017–2019
Dibromoacetic Acid
2 µg/L
No EPA limit set
 12/22 SYR4 2017–2019
Atrazine
0.4800 µg/L 16%
of the EPA limit 3 µg/L
worst single sample: 0.5000 µg/L
2/9 SYR4 2012–2019
Barium
172.7 µg/L 8.6%
of the EPA limit 2000 µg/L
worst single sample: 180 µg/L
2/3 SYR4 2012–2018
Lead
0.0050 mg/L 33%
of the EPA limit 0.0150 mg/L
 2/2 LCR 1996
Chromium
1 µg/L 1%
of the EPA limit 100 µg/L
 1/3 SYR4 2012–2018
64 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,3,7,8-TCDD2,4,5-TP2,4-DAntimony, TotalArsenicAsbestosBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneCombined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneFluorideGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
HERBERT MATTERN.
Phone
717-665-4508

Frequently asked questions about Northwestern Lancaster Co Auth

Is Northwestern Lancaster Co Auth tap water safe to drink?

EPA monitoring detected 16 contaminants in Northwestern Lancaster Co 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 Northwestern Lancaster Co Auth's water?

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

How many people does Northwestern Lancaster Co Auth serve?

Northwestern Lancaster Co Auth reports serving 2,968 people in Pennsylvania, per its EPA record.

Has Northwestern Lancaster Co Auth had any water quality violations?

The EPA has 165 violations on file for Northwestern Lancaster Co Auth, of which 35 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.