Is City of Chesapeake - Northwest River Sys Tap Water Safe? Quality Report

Water source: Surface water
Ownership: Local government

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
MCL	Health-based	Archived	2003-08-01 → 2004-07-31
MCL	Health-based	Archived	2003-08-01 → 2004-07-31
MCL	Health-based	Archived	2003-08-01 → 2004-07-31
TT	Health-based	Resolved	2002-12-01 → 2002-12-31
TT	Health-based	Resolved	2002-12-01 → 2002-12-31
TT	Health-based	Resolved	2002-12-01 → 2002-12-31
TT	Health-based	Resolved	2002-12-01 → 2002-12-31
MCL	Health-based	Resolved	2001-01-01 → 2001-12-31
MCL	Health-based	Resolved	2001-01-01 → 2001-12-31
MCL	Health-based	Resolved	2001-01-01 → 2001-12-31

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
Copper	114.6 µg/L 8.8% of the EPA limit 1300 µg/L worst single sample: 262 µg/L	369/595	SYR4	2012–2019
TTHM	51.05 µg/L 64% of the EPA limit 80 µg/L worst single sample: 72 µg/L	256/256	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	39 µg/L 65% of the EPA limit 60 µg/L worst single sample: 49 µg/L	247/257	SYR4	2012–2019
Lead	13.637 µg/L 91% of the EPA limit 15 µg/L worst single sample: 358 µg/L	112/595	SYR4	2012–2019
Bromodichloromethane	10.15 µg/L No EPA limit set worst single sample: 10.6 µg/L	111/116	SYR4	2014–2019
Chloroform	33.9 µg/L No EPA limit set worst single sample: 42.6 µg/L	111/116	SYR4	2014–2019
Dibromochloromethane	2.89 µg/L No EPA limit set worst single sample: 3.8 µg/L	111/116	SYR4	2014–2019
Trichloroacetic Acid	12 µg/L No EPA limit set worst single sample: 15 µg/L	97/104	SYR4	2015–2019
Dichloroacetic Acid	18 µg/L No EPA limit set worst single sample: 23 µg/L	95/104	SYR4	2015–2019
Monobromoacetic Acid	5 µg/L No EPA limit set worst single sample: 6 µg/L	31/104	SYR4	2015–2019
Lead	0.0011 mg/L 7.5% of the EPA limit 0.0150 mg/L	26/26	LCR	2025
Dibromoacetic Acid	2.802 µg/L No EPA limit set worst single sample: 11 µg/L	25/104	SYR4	2015–2019
Fluoride	1106 µg/L 28% of the EPA limit 4000 µg/L worst single sample: 1160 µg/L	19/19	SYR4	2012–2019
Monochloroacetic Acid	3 µg/L No EPA limit set	11/104	SYR4	2015–2019
Nitrate-Nitrite	335 µg/L 3.4% of the EPA limit 10000 µg/L worst single sample: 480 µg/L	11/16	SYR4	2012–2019
Barium	34.4 µg/L 1.7% of the EPA limit 2000 µg/L worst single sample: 36 µg/L	9/16	SYR4	2012–2019
Nitrate	190 µg/L 1.9% of the EPA limit 10000 µg/L	4/4	SYR4	2012–2013
Arsenic	1.836 µg/L 18% of the EPA limit 10 µg/L worst single sample: 2 µg/L	3/19	SYR4	2012–2019
Bromoform	1.745 µg/L No EPA limit set worst single sample: 1.8 µg/L	2/116	SYR4	2014–2019
Combined Radium (-226 And -228)	0.3000 pCi/L 6% of the EPA limit 5 pCi/L	2/2	SYR4	2014
Gross Beta Particle Activity	4.1 pCi/L No EPA limit set	1/2	SYR4	2014

63 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalBenzeneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbon TetrachlorideChromiumDichloromethaneEthylene DibromideEthylbenzeneGross Alpha, Excl. Radon And UHfpo-DaMercuryNetfosaaNfdhaNmefosaaNitritePfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Frequently asked questions about City of Chesapeake - Northwest River Sys

Is City of Chesapeake - Northwest River Sys tap water safe to drink?

EPA monitoring detected 21 contaminants in City of Chesapeake - Northwest River Sys'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 City of Chesapeake - Northwest River Sys's water?

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

How many people does City of Chesapeake - Northwest River Sys serve?

City of Chesapeake - Northwest River Sys reports serving 165,240 people, per its EPA record.

Has City of Chesapeake - Northwest River Sys had any water quality violations?

The EPA has 29 violations on file for City of Chesapeake - Northwest River Sys, of which 11 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.