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Tap water quality report

City of Morgan Hill

EPA monitoring tested this supplier for 112 contaminants and detected 27. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

112
contaminants tested
27
detected
47,374
people served
246
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
Ground water
Ownership
Local government
Counties served
Santa Clara

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.

246
health-based violations
254
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 1993-08-01 → 1993-08-31
MCL Health-based Resolved 1993-08-01 → 1993-08-31
MCL Health-based Resolved 1993-08-01 → 1993-08-31
MCL Health-based Resolved 1993-08-01 → 1993-08-31
MCL Health-based Resolved 1993-08-01 → 1993-08-31
MCL Health-based Archived 1988-07-01 → 1988-07-31
MCL Health-based Archived 1988-06-01 → 1988-06-30
MCL Health-based Archived 1988-06-01 → 1988-06-30
MCL Health-based Archived 1988-06-01 → 1988-06-30
MCL Health-based Archived 1988-06-01 → 1988-06-30

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
PFHXS 0.0033 µg/L 3/32 2024
Pfpea 0.0035 µg/L 3/32 2024
Pfhxa 0.0034 µg/L 2/32 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 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
6700 µg/L 67%
of the EPA limit 10000 µg/L
worst single sample: 7400 µg/L
370/372 SYR4 2012–2019
TTHM
13.702 µg/L 17%
of the EPA limit 80 µg/L
worst single sample: 39.24 µg/L
89/105 SYR4 2013–2019
Bromoform
10.035 µg/L
No EPA limit set
worst single sample: 15.53 µg/L
86/105 SYR4 2013–2019
Dibromoacetic Acid
2.8 µg/L
No EPA limit set
worst single sample: 3.3 µg/L
72/100 SYR4 2013–2019
Dibromochloromethane
2.8845 µg/L
No EPA limit set
worst single sample: 3.13 µg/L
62/105 SYR4 2013–2019
Total Haloacetic Acids (HAA5)
2.96 µg/L 4.9%
of the EPA limit 60 µg/L
worst single sample: 8.8 µg/L
55/100 SYR4 2013–2019
Fluoride
197.5 µg/L 4.9%
of the EPA limit 4000 µg/L
worst single sample: 200 µg/L
46/54 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 37/37 LCR 2024
Barium
161.4 µg/L 8.1%
of the EPA limit 2000 µg/L
worst single sample: 188 µg/L
35/54 SYR4 2012–2019
Lithium
25.5 µg/L
No EPA limit set
 27/32 UCMR-5 2024
Nitrate-Nitrite
6410 µg/L 64%
of the EPA limit 10000 µg/L
worst single sample: 6900 µg/L
24/25 SYR4 2015–2019
Chromium
18 µg/L 18%
of the EPA limit 100 µg/L
 21/54 SYR4 2012–2019
Arsenic
2 µg/L 20%
of the EPA limit 10 µg/L
 12/54 SYR4 2012–2019
Nitrite
400 µg/L 40%
of the EPA limit 1000 µg/L
 10/54 SYR4 2012–2019
Bromodichloromethane
2.02 µg/L
No EPA limit set
worst single sample: 2.13 µg/L
3/105 SYR4 2013–2019
Copper
11.4 µg/L 0.9%
of the EPA limit 1300 µg/L
worst single sample: 12 µg/L
3/53 SYR4 2012–2019
Gross Beta Particle Activity
1.0113 pCi/L
No EPA limit set
worst single sample: 1.07 pCi/L
3/5 SYR4 2012–2018
Selenium
2 µg/L 4%
of the EPA limit 50 µg/L
 3/54 SYR4 2012–2019
Antimony, Total
9.505 µg/L 158%
of the EPA limit, at the 95th percentile of samples — 6 µg/L
worst single sample: 9.9 µg/L
2/58 SYR4 2012–2019
Combined Uranium
0.5452 µg/L 1.8%
of the EPA limit 30 µg/L
worst single sample: 0.5662 µg/L
2/6 SYR4 2012–2018
Chloroform
39.24 µg/L
No EPA limit set
 1/105 SYR4 2013–2019
Dichloroacetic Acid
4.7 µg/L
No EPA limit set
 1/100 SYR4 2013–2019
Lead
1000 µg/L 6667%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
 1/57 SYR4 2012–2019
Trichloroacetic Acid
1.8 µg/L
No EPA limit set
 1/100 SYR4 2013–2019
85 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-PF3ONSAdonaAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfmbaPfmpaPFNAPFOAPFOSPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
SYLVAIN, JAMES
Phone
408-310-4166
Email
[email protected]

Frequently asked questions about City of Morgan Hill

Is City of Morgan Hill tap water safe to drink?

EPA monitoring detected 27 contaminants in City of Morgan Hill'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 Morgan Hill's water?

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

How many people does City of Morgan Hill serve?

City of Morgan Hill reports serving 47,374 people in California, per its EPA record.

Has City of Morgan Hill had any water quality violations?

The EPA has 254 violations on file for City of Morgan Hill, of which 246 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.