To provide unadulterated food products to the consumers and to ensure quality, Thirty State Agmark Grading Laboratories and One Principal Laboratory are functioning in Tamil Nadu. Agmark is a quality certification mark on agricultural products in India. Agmark is legally enforced by the Agricultural Produce (Grading and Marking) Act of 1937 (and amended in 1986) by Directorate of Marketing and Inspection, Government of India. Presently Agmark standards cover quality specifications for 223 commodities. This scheme is a voluntary one.

In Agmark Grading Laboratories, products graded are Rice, Pulses, Ghee, Honey, Ground Spices, Whole Spices, Sago, Vegetable Oils, Gram Flour, compounded Asafoetida etc., During 2018-19 agricultural commodities to the tune of 23.58 lakh quintals were graded and grading charges of Rs. 79.78 lakhs has been collected as State revenue.

S.No	District Name	Agmark Lab	Image
1	Chennai	Principal Laboratory
2	Kancheepuram	Chennai (North)
3	Kancheepuram	Chennai (South)
4	Vellore	Vellore
5	Cuddalore	Panruti
6	Thanjavur	Thanjavur
7	Tiruchirapalli	Trichy ? I
8	Tiruchirapalli	Trichy ? II
9	Karur	Karur
10	Madurai	Madurai ? (North)
11	Madurai	Madurai ? (South)
12	Theni	Theni
13	Dindigul	Dindigul
14	Virudhunagar	Virudhunagar
15	Tirunelveli	Tirunelveli
16	Tirunelveli	Thenkasi
17	Thoothukudi	Thoothukudi
18	Kanniyakumari	Nagerkoil
19	Kanniyakumari	Marthandam
20	Salem	Salem
21	Dharmapuri	Dharmapuri
22	Coimbatore	Coimbatore
23	Erode	Erode ? I
24	Erode	Erode ? II
25	Erode	Chithode
26	Erode	Perundurai
27	Coimbatore	Tiruppur
28	Coimbatore	Palladam
29	Coimbatore	Kangayam ? I
30	Coimbatore	Kangayam ? II
31	Coimbatore	Vellakkoil