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Tap water quality report

Rio Manor Mutual Water Co

EPA monitoring tested this supplier for 80 contaminants and detected 19. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

80
contaminants tested
19
detected
983
people served
4
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
Ground water
Ownership
Private
Counties served
Ventura

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.

4
health-based violations
20
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2015-01-01 → 2015-01-31
MCL Health-based Resolved 2015-01-01 → 2015-01-31
MCL Health-based Resolved 2004-04-19 → 2004-11-11
MCL Health-based Resolved 2004-04-19 → 2004-11-11
MON Monitoring Resolved 2019-09-01 → 2020-03-21
MON Monitoring Resolved 2019-09-01 → 2020-03-21
MR Monitoring Resolved 2015-02-01
MR Monitoring Resolved 2015-02-01
MR Monitoring Resolved 2011-06-01
MR Monitoring Resolved 2011-06-01

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
6655.7 µg/L 67%
of the EPA limit 10000 µg/L
worst single sample: 6757.4 µg/L
76/76 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 22/22 LCR 2024
Dibromoacetic Acid
3.75 µg/L
No EPA limit set
worst single sample: 4 µg/L
6/6 SYR4 2014–2019
Fluoride
700 µg/L 18%
of the EPA limit 4000 µg/L
 6/6 SYR4 2012–2018
Selenium
49.75 µg/L 100%
of the EPA limit 50 µg/L
worst single sample: 50 µg/L
6/6 SYR4 2012–2018
Total Haloacetic Acids (HAA5)
3.75 µg/L 6.3%
of the EPA limit 60 µg/L
worst single sample: 4 µg/L
6/6 SYR4 2014–2019
Bromoform
5.62 µg/L
No EPA limit set
worst single sample: 6 µg/L
5/6 SYR4 2014–2019
Dibromochloromethane
3.2 µg/L
No EPA limit set
 5/6 SYR4 2014–2019
TTHM
10.2 µg/L 13%
of the EPA limit 80 µg/L
worst single sample: 10.5 µg/L
5/6 SYR4 2014–2019
Barium
37.565 µg/L 1.9%
of the EPA limit 2000 µg/L
worst single sample: 39.5 µg/L
4/6 SYR4 2012–2018
Combined Uranium
15.9504 µg/L 53%
of the EPA limit 30 µg/L
worst single sample: 16.688 µg/L
4/4 SYR4 2016–2019
Bromodichloromethane
1.76 µg/L
No EPA limit set
worst single sample: 1.8 µg/L
3/6 SYR4 2014–2019
Arsenic
2.95 µg/L 30%
of the EPA limit 10 µg/L
worst single sample: 3 µg/L
2/6 SYR4 2012–2018
Cadmium
0.4850 µg/L 9.7%
of the EPA limit 5 µg/L
worst single sample: 0.5000 µg/L
2/6 SYR4 2012–2018
Nitrate-Nitrite
2850 µg/L 28%
of the EPA limit 10000 µg/L
worst single sample: 2900 µg/L
2/2 SYR4 2018
Chloroform
1.4 µg/L
No EPA limit set
 1/6 SYR4 2014–2019
Di(2-ethylhexyl) Phthalate
5 µg/L 83%
of the EPA limit 6 µg/L
 1/2 SYR4 2018–2019
Lead
6.8 µg/L 45%
of the EPA limit 15 µg/L
 1/6 SYR4 2012–2018
Mercury
0.0300 µg/L 1.5%
of the EPA limit 2 µg/L
 1/6 SYR4 2012–2018
61 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, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCopperCyanideCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDichloroacetic AcidDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNitriteOxamylPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
MCADOO, DURRELL
Phone
805-482-2001
Email
[email protected]

Frequently asked questions about Rio Manor Mutual Water Co

Is Rio Manor Mutual Water Co tap water safe to drink?

EPA monitoring detected 19 contaminants in Rio Manor Mutual Water Co'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 Rio Manor Mutual Water Co's water?

EPA monitoring detected Nitrate, Lead, Dibromoacetic Acid, Fluoride, Selenium, and others. The full list with the level and data source for each is above.

How many people does Rio Manor Mutual Water Co serve?

Rio Manor Mutual Water Co reports serving 983 people in California, per its EPA record.

Has Rio Manor Mutual Water Co had any water quality violations?

The EPA has 20 violations on file for Rio Manor Mutual Water Co, of which 4 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.