Is Mason Co Psd-Lakin Dist Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Local government
Counties served: Mason

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.

health-based violations

violations on file

still open

Violation	Type	Status	Period
TT	Health-based	Unaddressed	2026-03-13
MCL	Health-based	Resolved	1998-10-01 → 1998-12-31
MCL	Health-based	Resolved	1998-10-01 → 1998-12-31
MCL	Health-based	Resolved	1998-10-01 → 1998-12-31
MCL	Health-based	Resolved	1998-07-01 → 1998-09-30
MCL	Health-based	Resolved	1998-07-01 → 1998-09-30
MCL	Health-based	Resolved	1998-07-01 → 1998-09-30
MR	Monitoring	Archived	2023-01-01 → 2025-12-31
MR	Monitoring	Archived	2023-01-01 → 2025-12-31
MR	Monitoring	Archived	2023-01-01 → 2025-12-31

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.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Nitrate	5710 µg/L 57% of the EPA limit 10000 µg/L worst single sample: 6060 µg/L	42/42	SYR4	2012–2019
Copper	237.4 µg/L 18% of the EPA limit 1300 µg/L worst single sample: 294 µg/L	30/30	SYR4	2013–2019
Lead	9.775 µg/L 65% of the EPA limit 15 µg/L worst single sample: 13.6 µg/L	30/30	SYR4	2013–2019
Lead	0.0045 mg/L 30% of the EPA limit 0.0150 mg/L	14/14	LCR	2025
Bromoform	3.086 µg/L No EPA limit set worst single sample: 3.1 µg/L	8/8	SYR4	2012–2019
Dibromoacetic Acid	2.6305 µg/L No EPA limit set worst single sample: 2.83 µg/L	8/8	SYR4	2012–2019
Dibromochloromethane	3.364 µg/L No EPA limit set worst single sample: 3.91 µg/L	8/8	SYR4	2012–2019
TTHM	12.6565 µg/L 16% of the EPA limit 80 µg/L worst single sample: 15.6 µg/L	8/8	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	8.1055 µg/L 14% of the EPA limit 60 µg/L worst single sample: 8.97 µg/L	8/8	SYR4	2012–2019
Bromodichloromethane	6.615 µg/L No EPA limit set worst single sample: 8.22 µg/L	6/8	SYR4	2012–2019
Chloroform	2.189 µg/L No EPA limit set worst single sample: 2.45 µg/L	4/8	SYR4	2012–2019
Barium	53.61 µg/L 2.7% of the EPA limit 2000 µg/L worst single sample: 53.9 µg/L	3/3	SYR4	2013–2019
Dichloroacetic Acid	2.573 µg/L No EPA limit set worst single sample: 2.7 µg/L	3/8	SYR4	2012–2019
Fluoride	147 µg/L 3.7% of the EPA limit 4000 µg/L worst single sample: 150 µg/L	3/3	SYR4	2013–2019
Monochloroacetic Acid	5.361 µg/L No EPA limit set worst single sample: 5.58 µg/L	2/8	SYR4	2012–2019
Antimony, Total	0.4000 µg/L 6.7% of the EPA limit 6 µg/L	1/3	SYR4	2013–2019
Gross Alpha, Excl. Radon And U	1.23 pCi/L 8.2% of the EPA limit 15 pCi/L	1/2	SYR4	2013–2019
Nitrite	350 µg/L 35% of the EPA limit 1000 µg/L	1/1	SYR4	2019
Selenium	1.7 µg/L 3.4% of the EPA limit 50 µg/L	1/3	SYR4	2013–2019
Thallium, Total	0.2000 µg/L 10% of the EPA limit 2 µg/L	1/3	SYR4	2013–2019
Trichloroacetic Acid	1 µg/L No EPA limit set	1/8	SYR4	2012–2019

54 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DArsenicAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylene DibromideEndrinEthylbenzeneHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidOxamylPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Frequently asked questions about Mason Co Psd-Lakin Dist

Is Mason Co Psd-Lakin Dist tap water safe to drink?

EPA monitoring detected 21 contaminants in Mason Co Psd-Lakin Dist'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 Mason Co Psd-Lakin Dist's water?

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

How many people does Mason Co Psd-Lakin Dist serve?

Mason Co Psd-Lakin Dist reports serving 4,296 people, per its EPA record.

Has Mason Co Psd-Lakin Dist had any water quality violations?

The EPA has 86 violations on file for Mason Co Psd-Lakin Dist, of which 7 are health-based (a contaminant limit or required treatment was breached) and 2 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.