Correct

爆表

/ bào biǎo / 
Strokes

Definition

off the charts/extreme/beyond the normal range of measurement

Example

As a Verb

(of Air Quality Index) exceed 500 micrograms/m3; (of PM2.5 concentration values) exceed the limits; be beyond index

1
Zuótiān
昨天
kōngqì
空气
zhìliàng
质量
zhǐshù
指数
bào
爆
biǎo
表
  
。

Air Quality Index exceeded 500 micrograms per m3yesterday.

2
PM2  5
PM2.5
shùzhí
数值
bào
爆
biǎo
表
  
。

PM2.5 concentration values exceed limits. / PM2.5 levels exceed limits.

3
Bào
爆
biǎo
表
dúshù
读数
515
515

‘Beyond Index' reading of 515