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Tap water quality report

Monte Vista Wd

EPA monitoring tested this supplier for 110 contaminants and detected 27. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

110
contaminants tested
27
detected
56,017
people served
0
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
SWP
Ownership
Local government
Counties served
San Bernardino

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.

0
health-based violations
2
violations on file
0
still open
ViolationTypeStatusPeriod
MR Monitoring Resolved 2013-06-07
MR Monitoring Resolved 2013-06-07

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
PFHXS 0.0074 µg/L 7/20 2025
PFOS 0.0056 µg/L 4/21 2025
Pfba 0.0110 µg/L 2/21 2025
Pfhxa 0.0033 µg/L 1/20 2025
Pfpea 0.0035 µg/L 1/20 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 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
Nitrate
20114 µg/L 201%
of the EPA limit, in the worst sample — 10000 µg/L
 5092/5758 SYR4 2012–2019
1,2-DIBROMO-3-CHLOROPROPANE
0.5300 µg/L 265%
of the EPA limit, in the worst sample — 0.2000 µg/L
 504/1104 SYR4 2012–2019
TTHM
82 µg/L 102%
of the EPA limit, in the worst sample — 80 µg/L
 203/262 SYR4 2012–2019
Dibromochloromethane
33 µg/L
No EPA limit set
 196/280 SYR4 2012–2019
Bromoform
32 µg/L
No EPA limit set
 182/291 SYR4 2012–2019
Bromodichloromethane
24 µg/L
No EPA limit set
 180/271 SYR4 2012–2019
Chloroform
24.7 µg/L
No EPA limit set
 169/266 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
18.1 µg/L 30%
of the EPA limit 60 µg/L
 132/283 SYR4 2012–2019
Dibromoacetic Acid
10.4 µg/L
No EPA limit set
 130/285 SYR4 2012–2019
Dichloroacetic Acid
6.2 µg/L
No EPA limit set
 99/283 SYR4 2012–2019
Trichloroacetic Acid
5 µg/L
No EPA limit set
 78/284 SYR4 2012–2019
Fluoride
300 µg/L 7.5%
of the EPA limit 4000 µg/L
 32/36 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 27/27 LCR 2025
Nitrate-Nitrite
17000 µg/L 170%
of the EPA limit, in the worst sample — 10000 µg/L
 20/20 SYR4 2016–2019
Arsenic
5.9 µg/L 59%
of the EPA limit 10 µg/L
 16/33 SYR4 2012–2019
Monobromoacetic Acid
1.3 µg/L
No EPA limit set
 16/292 SYR4 2012–2019
1,1-Dichloroethylene
0.5200 µg/L 7.4%
of the EPA limit 7 µg/L
 3/35 SYR4 2012–2019
Copper
98 µg/L 7.5%
of the EPA limit 1300 µg/L
 1/36 SYR4 2012–2019
Chromium
12 µg/L 12%
of the EPA limit 100 µg/L
 1/33 SYR4 2012–2019
Lead
8.4 µg/L 56%
of the EPA limit 15 µg/L
 1/33 SYR4 2012–2019
Tetrachloroethylene
0.6400 µg/L 13%
of the EPA limit 5 µg/L
 1/35 SYR4 2012–2019
Trichloroethylene
0.5800 µg/L 12%
of the EPA limit 5 µg/L
 1/35 SYR4 2012–2019
83 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAsbestosAtrazineBhc-GammaBariumBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfmbaPfmpaPFNAPFOAPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
SCOTT-COE, JUSTIN
Phone
909-267-2125
Email
jscottcoe@mvwd.org

Frequently asked questions about Monte Vista Wd

Is Monte Vista Wd tap water safe to drink?

EPA monitoring detected 27 contaminants in Monte Vista Wd'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 Monte Vista Wd's water?

EPA monitoring detected Nitrate, 1,2-DIBROMO-3-CHLOROPROPANE, TTHM, Dibromochloromethane, Bromoform, and others. The full list with the level and data source for each is above.

How many people does Monte Vista Wd serve?

Monte Vista Wd reports serving 56,017 people in California, per its EPA record.

Has Monte Vista Wd had any water quality violations?

The EPA has 2 violations on file for Monte Vista Wd, of which 0 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.