Discovery World Montessori · Infant Center, Diamond Bar
Discovery World Montessori is a licensed child care center in Diamond Bar, CA, licensed for up to 24 children and serving infants and toddlers. It has held its California license since 2019. Since February 2021, state licensing staff have inspected it 3 times. The state issued 5 citations, 0 of them Type A (the most serious), most often for training & qualifications (2 of 5). None came in the last 12 months. Measured by weighted citations per inspection, it is #15 of 19 centers in Diamond Bar and has more citations per inspection than 76% of California licensed centers.
Inspection record
Every state visit
What inspectors cited most
Citations, newest first
Based on record review, the licensee did not comply with the section cited above in [count] out of which poses/posed a potential health, safety or personal rights risk to persons in care.
Based on record review, the licensee did not comply with the section cited above in [count] out of which poses/posed a potential health, safety or personal rights risk to persons in care.
Water testing results identified with Action Level Exceedance as defined in WD section 101700.3 are not deemed safe to drink. This poses an potential risk to the health of safety of children in care.
Based on (interview, the licensee did not comply with the section cited above in water lead test has not been done as required, which poses/posed a potential health, safety or personal rights risk to persons in care.
Based on record review, the licensee did not comply with the section cited above in LPA observed certificates are current but not EMSA approved as required, no EMSA sticker and the enttity is not the Red Cross or the American Heart Assocation, which poses/posed a potential health, safety or personal rights risk to persons in care.
How common are lead-in-water citations in Los Angeles County? See the county-by-county report →
About this center
Other licenses at this address
Common questions
Does Discovery World Montessori take infants?
Yes. It is licensed by California as an infant center.
Has Discovery World Montessori had any serious violations?
No Type A citations since 2021. It has 5 Type B citations, listed above.
How does Discovery World Montessori compare with other daycares in Diamond Bar?
It is #15 of 19 centers in Diamond Bar by weighted citations per inspection, and has more citations per inspection than 76% of California licensed centers with enough inspection history to compare.
When was Discovery World Montessori last inspected?
Feb 5, 2026. No citations were issued during that visit.
How much does Discovery World Montessori cost?
California does not publish individual centers’ prices, so ask Discovery World Montessori for its current tuition. For comparison, the median full-time price at licensed centers in Los Angeles County, which includes Diamond Bar, was $1,555 a month for infants (about $1,960 today) in the state’s 2021 Regional Market Rate Survey.
Who runs Discovery World Montessori?
The licensee is Li And Chen LLC, and the administrator listed with the state is Jia Jia Chen.
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21805 E. Copley Dr., Diamond Bar · 1.0 mi away · 16 spotsMore citations than mostTowne & County Preschool & Infant Center At Aqmd
21805 E. Copley Dr., Diamond Bar · 1.0 mi away · 76 spotsNo citationsMontessori Of Walnut
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20121 E. Alisu Court, Walnut · 1.1 mi away · 178 spotsMore citations than most
Citations are quoted from California Department of Social Services inspection and complaint reports. Type A citations are the state’s most serious category (an immediate risk to children’s health, safety or personal rights); Type B citations are a potential risk. A citation is a finding about one rule, not a judgment about a center overall. Complaint allegations appear here only when the state substantiated them.
To read the full state reports, search facility number 198019940 on the California Care Facility Search. Data refreshed Oct 3, 2026.